
Unlocking the potential of renewable energy for a sustainable future
When we talk about climate change, it often triggers resistance. For many, the topic comes loaded with political or ideological connotations. But beyond the labels lies an undeniable need to rethink how we operate—especially when it comes to managing waste and embracing renewable energy. The key isn't just about reducing carbon footprints; it's about reshaping our economic and industrial systems to create sustainable, circular economies where materials are reused, emissions are minimized, and communities thrive.
Renewable energy has emerged as a cornerstone of this transformation. When people think about renewables, solar panels and wind turbines likely come to mind. Yet there's another powerful, often‑overlooked resource: wood waste.
In 2010, the U.S. Environmental Protection Agency estimated that roughly 15.9 million tons of wood waste entered municipal solid‑waste streams, with only 15% of that recovered for reuse or energy. Meanwhile, newer studies suggest that if you combine yard trimmings and wood waste, the total available is closer to 21.8 million tons annually.
Why does this matter? Because every ton of wood waste represents embodied energy—energy we already invested growing, harvesting, and processing that timber. When wood ends up in landfills, that potential is simply buried. By contrast, processing wood waste into biomass fuel or bio‑products taps into a dispatchable renewable energy source, one that can complement intermittent wind and solar output.
ADVANCES IN BIOMASS TECHNOLOGY
Historically, biomass facilities struggled with emissions controls, leading to concerns about local air quality and particulate pollution. Today, however, cutting‑edge facilities are combining biomass combustion with advanced carbon capture and stringent particulate filters. Some pioneering projects have retrofitted old coal‑fired power plants, replacing coal feedstocks with sustainably sourced biomass and installing capture technology to trap CO₂ before it reaches the atmosphere. This approach can drastically reduce greenhouse‑gas emissions compared to traditional fossil‑fuel plants, making biomass a truly sustainable option when managed and regulated properly.
Wood waste is just one piece of the larger waste‑management puzzle. In 2018, the EPA reported that 18.1 million tons of wood entered U.S. municipal solid waste—about 6.2% of all MSW that year—and only 17.1% of that was recycled (e.g., chipped for mulch), while 8.2% was combusted for energy recovery, and 8.3% was landfilled. Meanwhile, 50% of all U.S. MSW still ends up in landfills, despite recycling and composting rates climbing to around 32% and energy recovery to 12%.
By integrating waste‑diversion strategies from the very start of projects—whether construction of a new manufacturing facility or operation of a large industrial site—companies can dramatically cut disposal costs, create local feedstocks for on‑site energy generation, and reduce environmental impact. Treating waste as a resource rather than a problem is the bedrock of a circular economy.
BROADER HEALTH, ECONOMIC, AND JOB BENEFITS
Switching to renewables yields far‑reaching co‑benefits beyond simply slashing CO₂. A 2024 Cell Reports Sustainability study found that, between 2019 and 2022, the U.S. increased wind and solar generation by 55%, raising their share to 14% of electricity supply. That shift cut 900 million metric tons of CO₂—equivalent to removing 71 million cars from the road each year—and avoided 1 million metric tons of SO₂ and NOₓ emissions, delivering $249 billion in combined climate and health benefits.
International Renewable Energy Agency (IRENA) forecasts that under a 1.5 °C‑compatible energy pathway, renewables could support 43 million jobs by 2050. Even more conservative estimates suggest 40 million total energy‑sector jobs—including manufacturing, installation, maintenance, and R&D—by mid‑century.
On the health front, reducing air pollution from fossil combustion can cut premature mortality dramatically. Studies of low‑emission zones in European cities found sustained reductions in particulate pollution and NO₂, with downstream benefits including slower growth in chronic disease and healthcare savings—underscoring the broader social value of clean energy transitions.
THE RIPPLE EFFECTS ON GLOBAL LOGISTICS
An often‑overlooked ripple effect of cutting fossil‑fuel use is reduced international shipping of coal, oil, and gas. Nearly half of maritime bulk cargo volumes are energy commodities. By lowering demand for fossil‑fuel transport, ports would see less congestion, shipping emissions would fall, and carriers could repurpose vessels for other goods, all of which would benefit global trade efficiency and reduce ocean pollution.
SCALING SOLAR, WIND, AND MORE
While biomass and waste‑to‑energy capture crucial local resources, scaling wind and solar remains vital. Government and private‑sector partnerships—like those on public lands, where 96 utility‑scale wind, solar, and geothermal projects already generate over 5,000 MW powering more than two million homes and delivering over $660 million in rent and royalty payments since 1982—demonstrate the economic potential of strategic siting.
Distributed solutions—such as solar mini‑grids in rural Africa—highlight how renewables can uplift communities far beyond traditional grids. A 2024 cohort study in Kenya and Nigeria found that households linked to solar mini‑grids saw median incomes quadruple, improvements in gender equality, and health gains from cleaner lighting sources.
CHALLENGES AND THE PATH FORWARD
Despite these promising figures, challenges remain:
Up‑Front Costs And Infrastructure: Building new renewable capacity and modern grids demands capital. Yet costs continue to fall: Solar and wind have become cost‑competitive or cheaper than coal and gas in many regions.
Grid Integration And Storage: Managing intermittency requires investment in storage technologies and smarter grid management.
Policy And Regulatory Support: Clear, stable incentives—carbon pricing, renewable portfolio standards, tax credits—are essential to mobilize private investment and ensure long‑term project viability.
The renewable‑energy revolution isn't just about swapping technologies; it's about a fundamental shift in how we value resources—seeing waste as feedstock, emissions as externalities to be captured, and energy as a vector for health, equity, and economic opportunity. From unlocking the latent power in wood waste to scaling solar farms and offshore wind, each step multiplies benefits: cleaner air, more jobs, economic savings, and a stable climate.
As the world edges closer to critical climate thresholds, the urgency to act grows. But within that urgency lies unprecedented opportunity: to retool industries, revitalize communities, and ensure a liveable planet for generations to come. The future belongs to those who power it responsibly—and renewably.
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CNN
29 minutes ago
- CNN
Marijuana use doubles risk of dying from heart disease, large study finds
Drugs in society Heart disease Chronic diseasesFacebookTweetLink Follow Get inspired by a weekly roundup on living well, made simple. Sign up for CNN's Life, But Better newsletter for information and tools designed to improve your well-being. Using marijuana doubles the risk of dying from heart disease, according to a new analysis of pooled medical data involving 200 million people mostly between the ages of 19 and 59. 'What was particularly striking was that the concerned patients hospitalized for these disorders were young (and thus, not likely to have their clinical features due to tobacco smoking) and with no history of cardiovascular disorder or cardiovascular risk factors,' said senior author Émilie Jouanjus, an associate professor of pharmacology at the University of Toulouse, France, in an email. Compared to nonusers, those who used cannabis also had a 29% higher risk for heart attacks and a 20% higher risk for stroke, according to the study published Tuesday in the journal Heart. 'This is one of the largest studies to date on the connection between marijuana and heart disease, and it raises serious questions about the assumption that cannabis imposes little cardiovascular risk,' said pediatrician Dr. Lynn Silver, a clinical professor of epidemiology and biostatistics at University of California, San Francisco. 'Getting this right is critically important because cardiovascular disease is the top cause of death both in the United States and globally,' said Silver, who is also senior adviser at the Public Health Institute, a nonprofit public health organization that analyzes marijuana policy and legalization. Silver is the coauthor of an editorial published with the paper that calls for change in how cannabis is viewed by health professionals, regulatory bodies and the public at large. 'Clinicians need to screen people for cannabis use and educate them about its harms, the same way we do for tobacco, because in some population groups it's being used more widely than tobacco,' she said. 'Our regulatory system, which has been almost entirely focused on creating legal infrastructure and licensing legal, for-profit (cannabis) businesses, needs to focus much more strongly on health warnings that educate people about the real risks.' The new systematic review and meta-analysis analyzed medical information from large, observational studies conducted in Australia, Egypt, Canada, France, Sweden and the US between 2016 and 2023. Those studies did not ask people how they used cannabis — such as via smoking, vaping, dabbing, edibles, tinctures or topicals. (Dabbing involves vaporizing concentrated cannabis and inhaling the vapor.) However, 'based on epidemiological data, it is likely that cannabis was smoked in the vast majority of cases,' Jouanjus said. Smoking tobacco is a well-known cause of heart disease — both the smoke and the chemicals in tobacco damage blood vessels and increase clotting, according to the US Centers for Disease Control and Prevention. Therefore, it is not surprising that smoking, vaping or dabbing cannabis could do the same, Silver said: 'Any of the many ways of inhaling cannabis are going to have risks to the user, and there's also secondhand smoke risks, which are similar to tobacco.' The notion that smoking cannabis is less harmful because it's 'natural' is just wrong, Dr. Beth Cohen, professor of medicine at the University of California, San Francisco, told CNN in a prior interview. 'When you burn something, whether it is tobacco or cannabis, it creates toxic compounds, carcinogens, and particulate matter that are harmful to health,' Cohen said in an email. However, edibles may also play a role in heart disease, according to a May 2025 study. People who consumed edibles laced with tetrahydrocannabinol, or THC, showed signs of early cardiovascular disease similar to tobacco smokers. 'We found that vascular function was reduced by 42% in marijuana smokers and by 56% in THC-edible users compared to nonusers,' Dr. Leila Mohammadi, an assistant researcher in cardiology at the University of California, San Francisco, told CNN in a prior interview. None of the studies included in the new meta-analysis asked users about the potency of THC in the products they consume. Even if they had, that information would be quickly outdated, Silver said. 'The cannabis market is a moving target. It is getting more potent every day,' she said. 'What's being sold to people today in California is 510 times stronger than what it was in the 1970s. Concentrates can be 99% pure THC. Vapes are over 80% THC. 'A variety of chemically extracted cannabinoids can be almost pure THC, and all of these just have very different effects on people than smoking a joint in the 1970s.' Higher potency weed is contributing to a host of problems, including an increase in addiction — a July 2022 study found consuming high-potency weed was linked to a fourfold increased risk of dependence. In the United States, about 3 in 10 people who use marijuana have cannabis use disorder, the medical term for marijuana addiction, according to the CDC. 'We know that more potent cannabis makes people more likely to become addicted,' Silver said. 'We know that more potent cannabis makes people more likely to develop psychosis, seeing and hearing things that aren't there, or schizophrenia. Habitual users may also suffer from uncontrollable vomiting.' The rise in potency is one reason that the current study may not have captured the full extent of the risk of marijuana for heart disease, Jouanjus said: 'We are afraid that the association might be even stronger than that reported.' While science continues to study the risk, experts say it's time to think twice about the potential harms of cannabis use — especially if heart disease is a concern. 'If I was a 60-year-old person who had some heart disease risk, I would be very cautious about using cannabis,' Silver said. 'I've seen older people who are using cannabis for pain or for sleep, some of whom have significant cardiovascular risk, or who have had strokes or had heart attacks or had angina, and they have no awareness that this may be putting them at greater risk.'


CNN
39 minutes ago
- CNN
Marijuana use doubles risk of dying from heart disease, large study finds
Get inspired by a weekly roundup on living well, made simple. Sign up for CNN's Life, But Better newsletter for information and tools designed to improve your well-being. Using marijuana doubles the risk of dying from heart disease, according to a new analysis of pooled medical data involving 200 million people mostly between the ages of 19 and 59. 'What was particularly striking was that the concerned patients hospitalized for these disorders were young (and thus, not likely to have their clinical features due to tobacco smoking) and with no history of cardiovascular disorder or cardiovascular risk factors,' said senior author Émilie Jouanjus, an associate professor of pharmacology at the University of Toulouse, France, in an email. Compared to nonusers, those who used cannabis also had a 29% higher risk for heart attacks and a 20% higher risk for stroke, according to the study published Tuesday in the journal Heart. 'This is one of the largest studies to date on the connection between marijuana and heart disease, and it raises serious questions about the assumption that cannabis imposes little cardiovascular risk,' said pediatrician Dr. Lynn Silver, a clinical professor of epidemiology and biostatistics at University of California, San Francisco. 'Getting this right is critically important because cardiovascular disease is the top cause of death both in the United States and globally,' said Silver, who is also senior adviser at the Public Health Institute, a nonprofit public health organization that analyzes marijuana policy and legalization. Silver is the coauthor of an editorial published with the paper that calls for change in how cannabis is viewed by health professionals, regulatory bodies and the public at large. 'Clinicians need to screen people for cannabis use and educate them about its harms, the same way we do for tobacco, because in some population groups it's being used more widely than tobacco,' she said. 'Our regulatory system, which has been almost entirely focused on creating legal infrastructure and licensing legal, for-profit (cannabis) businesses, needs to focus much more strongly on health warnings that educate people about the real risks.' The new systematic review and meta-analysis analyzed medical information from large, observational studies conducted in Australia, Egypt, Canada, France, Sweden and the US between 2016 and 2023. Those studies did not ask people how they used cannabis — such as via smoking, vaping, dabbing, edibles, tinctures or topicals. (Dabbing involves vaporizing concentrated cannabis and inhaling the vapor.) However, 'based on epidemiological data, it is likely that cannabis was smoked in the vast majority of cases,' Jouanjus said. Smoking tobacco is a well-known cause of heart disease — both the smoke and the chemicals in tobacco damage blood vessels and increase clotting, according to the US Centers for Disease Control and Prevention. Therefore, it is not surprising that smoking, vaping or dabbing cannabis could do the same, Silver said: 'Any of the many ways of inhaling cannabis are going to have risks to the user, and there's also secondhand smoke risks, which are similar to tobacco.' The notion that smoking cannabis is less harmful because it's 'natural' is just wrong, Dr. Beth Cohen, professor of medicine at the University of California, San Francisco, told CNN in a prior interview. 'When you burn something, whether it is tobacco or cannabis, it creates toxic compounds, carcinogens, and particulate matter that are harmful to health,' Cohen said in an email. However, edibles may also play a role in heart disease, according to a May 2025 study. People who consumed edibles laced with tetrahydrocannabinol, or THC, showed signs of early cardiovascular disease similar to tobacco smokers. 'We found that vascular function was reduced by 42% in marijuana smokers and by 56% in THC-edible users compared to nonusers,' Dr. Leila Mohammadi, an assistant researcher in cardiology at the University of California, San Francisco, told CNN in a prior interview. None of the studies included in the new meta-analysis asked users about the potency of THC in the products they consume. Even if they had, that information would be quickly outdated, Silver said. 'The cannabis market is a moving target. It is getting more potent every day,' she said. 'What's being sold to people today in California is 510 times stronger than what it was in the 1970s. Concentrates can be 99% pure THC. Vapes are over 80% THC. 'A variety of chemically extracted cannabinoids can be almost pure THC, and all of these just have very different effects on people than smoking a joint in the 1970s.' Higher potency weed is contributing to a host of problems, including an increase in addiction — a July 2022 study found consuming high-potency weed was linked to a fourfold increased risk of dependence. In the United States, about 3 in 10 people who use marijuana have cannabis use disorder, the medical term for marijuana addiction, according to the CDC. 'We know that more potent cannabis makes people more likely to become addicted,' Silver said. 'We know that more potent cannabis makes people more likely to develop psychosis, seeing and hearing things that aren't there, or schizophrenia. Habitual users may also suffer from uncontrollable vomiting.' The rise in potency is one reason that the current study may not have captured the full extent of the risk of marijuana for heart disease, Jouanjus said: 'We are afraid that the association might be even stronger than that reported.' While science continues to study the risk, experts say it's time to think twice about the potential harms of cannabis use — especially if heart disease is a concern. 'If I was a 60-year-old person who had some heart disease risk, I would be very cautious about using cannabis,' Silver said. 'I've seen older people who are using cannabis for pain or for sleep, some of whom have significant cardiovascular risk, or who have had strokes or had heart attacks or had angina, and they have no awareness that this may be putting them at greater risk.'


CBS News
39 minutes ago
- CBS News
Cannabis use linked to a doubled risk of heart disease death, new study finds
New study links marijuana use to increased risk of heart attack and stroke With growing marijuana use across the country, studies have looked at the link between cannabis use and cardiovascular problems — but new research is showing the magnitude of such risk. In the study, published Tuesday in the journal Heart, researchers found cannabis use is linked to a doubled risk of dying from cardiovascular disease, a 29% higher risk for acute coronary syndrome and 20% higher risk for stroke. The authors analyzed data from 24 studies published from 2016 to 2023. "Our results provide a fully comprehensive report of the recent situation towards the cardiovascular health of cannabis users," the authors wrote, but added there were some study limitations, including potential imprecise dosage measurements. With recreational marijuana legal in 24 states, the U.S. Drug Enforcement Administration is moving to reclassify the drug to a less dangerous category under the Controlled Substances Act. Daily marijuana users now outnumber daily drinkers for the first time ever, according to a Carnegie Mellon University report last year. The preference shift is largely being driven by young people. For example, 69% of people aged 18 to 24 prefer marijuana to alcohol, according to a 2022 survey by New Frontier Data, a cannabis research firm. Due to increased usage, the perception of risk around marijuana has declined, health experts Dr. Lynn Silver of the Public Health Institute and Stanton Glantz, emeritus professor of the University of California at San Francisco, write in an editorial note that was published alongside the research, but the results of the study highlight the potential health effects. In the note, the authors called for the drug to "be treated like tobacco: not criminalized but discouraged," including added protection of bystanders from secondhand exposure. They also called for more research on whether cardiovascular risks are limited to inhaled products, which made up the majority of cases in the meta-analysis, or extend to other forms of cannabis exposure.