University of Albany researchers have presented the first recorded evidence that surface waters in the Adirondack Mountains have made an almost complete recovery — 90 percent — from metal pollution since enactment of the Clean Air Act.
Amended in the decades since it first passed in 1963, the Clean Air Act was one of the United States’ first environmental laws and was intended to lower and control the country’s air pollution.
One of the primary targets of the legislation was Adirondack Park, which had been impacted by decades of acid rain damage to the region’s forests, lakes and fish populations, a press release from the University at Albany (UAlbany) said.
Sky Hooler holds up a sediment core sample collected from Heart Lake in the Adirondack Mountains. University at Albany
“The Adirondacks have been a special place to me since I moved to the region when I was 10 years old. As a kid, I learned about the devastating effects acid rain had on the lakes, rivers and wildlife,” said Skylar Hooler, first author of the study and a doctoral student in the Department of Atmospheric and Environmental Sciences at UAlbany, in the press release. “During my first year of graduate school, I began reviewing the literature and was surprised to find that most recent studies evaluating recovery from metal pollution in the Adirondacks were more than a decade old. I immediately saw an opportunity to revisit this and document how well these ecosystems have recovered since the implementation of the Clean Air Act.”
The researchers analyzed historical data along with newly collected sediment samples and found that metal contamination across four Adirondack ponds had been reduced more than 90 percent over the past five decades.
Hooler’s research partner was Aubrey Hillman, an assistant professor in UAlbany’s Department of Atmospheric Sciences, whose research is focused on using lake sediments — more commonly known as mud — to study past human activities and climate change.
So proud of how hard my PhD student worked on this! And importantly it shows that legislation can WORK.
— Aubrey Hillman (@mountains-arose.bsky.social) April 9, 2025 at 9:51 AM
Hillman co-leads UAlbany’s Paleoclimate lab, which provided the research team with instruments to collect and analyze lake sediment and coral. The samples offered clues about our planet’s past climate conditions and how they relate to present and future climate trends.
“Collecting a sediment core is like taking a layered history book from the bottom of a lake,” Hooler explained. “Each layer of sediment represents a moment in time. We use specialized coring tools to extract these long, cylindrical records from the lake bed. The goal is to preserve the layers in the exact order they were deposited, so we get an uninterrupted timeline of environmental change that can stretch back thousands of years.”
The team used sediment cores taken from the four ponds to measure concentrations of metals such as lead, zinc and copper across millenia.
The sediment cores offered the researchers a look into pre-industrial baseline conditions, which allowed them to evaluate the extent of pollution, as well as the success of later recovery efforts, such as the Clean Air Act.
“Site selection was strategic,” Hooler said. “First, we had to ensure the lakes were on land we could legally access. Then, we prioritized lakes with similar hydrology and a consistent watershed-to-lake area ratio to allow for better comparisons. Finally, we looked at historical land-use impacts. Some lakes experienced extensive logging, others fire, and some were relatively undisturbed, so we could better understand how these factors influence both contamination and recovery.”
The Clean Air Act was a major factor in pollution reduction, but Hooler feels the recovery of Adirondack surface waters was largely formed by interactions between local watershed processes and lower emissions.
“Many lakes show peak metal deposition between 1970 and 1990, which aligns with the phased implementation of the Clean Air Act and its amendments,” Hooler said. “However, recovery also reflects local factors, like proximity to pollution sources and prevailing wind patterns. So, while the Clean Air Act laid the foundation, the response in each lake depended on its specific environment.”
The findings of the study, “Five decades after the Clean Air Act, legacy metal contaminants in Northeast U.S. surface waters document full recovery for the first time,” were published in the journal Environmental Pollution.
The post Clean Air Act Helped Reduce Metal Pollution in Adirondack Waters by 90%, Study Finds appeared first on EcoWatch.
https://www.ecowatch.com/clean-air-act-metal-pollution-adirondack-waters.html
Green Living
Best of Sustainability In Your Ear: Dandelion Energy CEO Dan Yates On How Geothermal Leasing Could Transform Home Heating and Cooling
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Return to one of our most compelling interviews of 2025. Amazingly, the same Congressional bill that gutted residential clean energy tax credits also led to a major breakthrough in financing home geothermal systems. Dan Yates, CEO of Dandelion Energy, explains how the Big, Beautiful Bill introduced changes that, for the first time, allow third-party leasing of residential geothermal systems. He shares why this policy change could help ground-source heat pumps grow the way leasing helped rooftop solar. Geothermal heating and cooling is four times more efficient than a furnace and twice as efficient as air-source heat pumps. Yet only about 1% of U.S. homes use it because the upfront costs for new geothermal systems have ranged from $20,000 to $31,000. The new leasing model means new homeowners can get geothermal systems for just $10 to $40 per month on a 20-year lease, which is usually far less than what they save on energy.
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Editor’s Note: This episode originally aired on December 29, 2025.
The post Best of Sustainability In Your Ear: Dandelion Energy CEO Dan Yates On How Geothermal Leasing Could Transform Home Heating and Cooling appeared first on Earth911.
https://earth911.com/podcast/sustainability-in-your-ear-dandelion-energy-ceo-dan-yates-on-how-geothermal-leasing-could-transform-home-heating-and-cooling/
The first Earth Day was celebrated on April 22, 1970 — 56 years ago — and, goodness, how the world has changed since then. We’ve come a long way since the days of burning our trash and pumping our gas guzzlers with leaded gasoline. In honor of those 56 years, here are 56 important changes and milestones since the first Earth Day.
Legislation
The U.S. government has led much of the environmental charge, starting with the implementation of the EPA (1) in July 1970. Later that year, the Clean Air Act (2) targeted air pollutants, followed by the Clean Water Act (3) in 1972 and the Endangered Species Act (4) in 1973.
Some lesser-known national laws included the Safe Water Drinking Act (5) in 1974, the Resource Conservation and Recovery Act (6) in 1976, the Toxic Substances Control Act (7) in 1976, the National Energy Act (8) in 1978, and the Medical Waste Tracking Act (9) in 1988.
In some cases, states have led the charge. Oregon passed the first bottle bill (10) in 1971, Minnesota’s Clean Indoor Air Act (11) was the first law to restrict smoking in public places (1975), and Massachusetts required low-flush toilets (12) for construction and remodeling in 1988.
Green Innovations: The Early Years
In order to comply with all the laws from the 1970s, we needed new technology to ensure consumers could adhere to the new standards. Consider:
- The “Crying Indian” PSA debuts in 1971 (13)
- Dichlorodiphenyltrichloroethane (DDT) gets banned in 1972 (14)
- The energy-efficient compact fluorescent light bulb launches in 1973 (15)
- Cars begin displaying fuel economy labels in the mid-1970s (16)
- In 1975, all cars are manufactured with catalytic converters to limit exhaust emissions (17)
- Chlorofluorocarbons are banned from aerosol cans starting in 1978 (18)
- The first curbside recycling program begins in New Jersey in 1980 (19)
- In 1986, McDonald’s switches from foam to paper food containers (20)
- Mercury is removed from latex paint in 1990, providing a viable alternative to banned lead paint (21)
- Earth911 launches the first U.S. recycling directory in 1991 (22)
- Energy Star certification debuts in 1992 for appliances and electronics (23)
- The U.S. Green Building Council begins in 1993 (24)
The Political Movement
The Green Party (25) launched in 1984, which was just the beginning of green issues entering the mainstream. One Percent for the Planet (26) was founded in 2002 to challenge businesses to donate to environmental causes, and the ISO 14001 standard (27) established environmental management. Companies are now facing pressure to allow employee telecommuting (28).
Things really developed after the release of Al Gore’s An Inconvenient Truth (29) in 2006. NBC debuted Green Week (30) in 2007. Carbon offsets (31) alleviated corporate green guilt. Bisphenol A (32) made us all question plastic purchases. Hybrid vehicles (33) generated tax credits and gas savings. Plastic bag bans gave rise to a reusable bag (34) craze. Fracking (35) and the Dakota Access Pipeline (36) were two of the most hotly contested news stories of the decade, at least until the 2016 election.
Green Tech: The Next Wave
In the past 10 years, emerging green tech has made eco-friendly a way of life, including:
- LED light bulbs (37)
- Portable solar panels on backpacks and watches (38)
- Plant-based plastics (39)
- Motion sensor lighting (40)
- Faucets with automatic shut-off (41)
- Low volatile organic compound (VOC) paint (42)
- Recycled plastic clothing (43)
- Ride-sharing mobile applications (44)
- Natural cleaning products (45)
- Biodiesel engine vehicles (46)
- Food waste composting (47)
- Portable air purifiers (48)
- Europe’s Green Deal introduced global recyclables shipping regulations to reduce pollution in low-income nations (49)
- Corporate borrowers headed toward $500 billion in bond financings for the renewables transition (50)
- President Biden rejoins the Paris Climate Accord on his first day in office. (51)
The Latest Five: 2022–2026
The pace of innovation has not slowed. Five more milestones have reshaped the environmental landscape since that 51st Earth Day:
- The Inflation Reduction Act (52), signed into law in August 2022, became the largest climate investment in U.S. history, directing roughly $370 billion toward clean energy tax credits, EV incentives, methane reduction, and domestic clean manufacturing. Analysts projected it will drive more than $4 trillion in cumulative capital investment over a decade and put the U.S. on track for a 40% emissions reduction by 2030. Sadly, many of its key provisions have been defunded or eliminated by the Trump Administration.
- The Kunming-Montreal Global Biodiversity Framework (53), adopted by 188 governments in December 2022, set the most ambitious biodiversity protection commitment in history. Its headline “30×30” target calls for conserving 30% of the planet’s land, freshwater, and ocean areas by 2030, a goal that would require doubling current protected land coverage and quadrupling marine protections.
- America’s first commercial direct air capture plant (54), opened by Heirloom Carbon Technologies in Tracy, California in November 2023, marked the arrival of atmospheric carbon removal at commercial scale on U.S. soil. The plant uses limestone to absorb CO₂ directly from the air, with the captured carbon injected into concrete for permanent storage. In May 2024, Climeworks activated the world’s largest direct air capture facility, the Mammoth plant in Iceland, with a design capacity to remove 36,000 tons of CO₂ per year.
- Solid-state batteries (55), a next-generation alternative to conventional lithium-ion technology, moved from laboratory promise toward commercial reality between 2022 and 2026. Unlike liquid-electrolyte batteries, solid-state versions are less flammable, achieve higher energy density, and degrade more slowly. In early 2025, Mercedes-Benz began road-testing a prototype EV powered by a lithium-metal solid-state cell that extended driving range 25% over comparable liquid-battery models. Multiple automakers and cell manufacturers now target commercial production between 2027 and 2030.
- Perovskite and tandem solar cells (56), a new photovoltaic technology that pairs conventional silicon with thin perovskite layers, pushed solar efficiency into territory once considered theoretical. By 2024, tandem cells in laboratory settings exceeded 34% efficiency — well above the roughly 22% ceiling of standard silicon panels only a few years ago. manufacturers in Asia and Europe began scaling pilot production lines. Because perovskite cells can be printed on flexible substrates, they open the door to solar surfaces on buildings, vehicles, and everyday objects that conventional panels cannot reach.
The past 56 years have been huge when it comes to saving the environment. Expect more to come, including a resurgent EV industry, nuclear fusion, regenerative agriculture, restorative forestry, and more, as costs and the cool factor improve.
Editor’s Note: Originally published on April 18, 2018, this article was most recently updated in April 2026.
The post 56 Environmental Innovations in the 56 Years Since Earth Day Began appeared first on Earth911.
https://earth911.com/eco-tech/eco-friendly-innovations/
This week’s quotation is from Franklin D. Roosevelt, 32nd president of the United States: “A nation that destroys its soils destroys itself. Forests are the lungs of our land, purifying the air and giving fresh strength to our people.”
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The post Earth911 Inspiration: Forests Are the Lungs of Our Land appeared first on Earth911.
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