The Petaluma Reusable Cup Project generated a lot of buzz when it launched in 2024. The results are in, and they show promise for scaling city-wide reuse programs.

Depleted groundwater poses a serious threat to communities and farms in California's Central Valley, but scientists say the region's cropland might also be critical for refilling the underground aquifers holding that water.

Only about 14 percent of U.S. commercial fleets included electric vehicles last year, but even as federal policies shift, signs point to continued and accelerated growth. Companies like Amazon are adding thousands of EVs to their fleets, and research shows fleet operators using EVs today have a 90 percent likelihood of purchasing more.

The U.S. hydropower sector is seeing increased investment, but uncertainty around tax credits could throw a wrench in plans for growth. We asked Malcolm Woolf, president and CEO of the National Hydropower Association, what's next for the sector and the policies it needs to thrive.

By removing carbon dioxide from the ocean, Captura disrupts a natural balancing act between the gas in the water and the gas in air, enhancing the ocean's ability to absorb the greenhouse gas from the atmosphere.

The Great Barrier Reef just became the first non-human nomination for an award honoring those working toward sustainable solutions for climate change, biodiversity loss, pollution and waste. Why nominate a reef?

Deep-sea mining could help meet the surging demand for clean energy minerals with fewer social harms. But without a true understanding of the environmental impacts and a lack of global regulations, the path ahead is in uncharted waters.

With a strong commitment to the environment at its core, a sustainable wine cooperative established in 1904 has grown to include nearly 1,600 winegrowers across Trentino, Italy.

Sustainable aviation fuel accounted for less than 0.15 percent of total fuel used among 77 leading airlines last year, but new supplies could soon change that. 

The climate startup Kairos Carbon developed a system that extracts carbon from livestock waste, sequesters it, and turns what's left into a fertilizer that doesn't leach into groundwater. The process reduces agricultural emissions while still reclaiming valuable nutrients from the waste.

Wind and especially solar already far outpace natural gas for new power generation additions to the nation’s grid, and that trend is expected to continue as signs indicate the demand for renewable energy has nowhere to go but up.