In what could be a turning point, the world’s nations reached an agreement in Paris that would commit them to cutting emissions and keeping global warming below 2 degrees. Although the pledges are not binding, the deal includes a review process to determine if countries are meeting their commitments.

Numerous technologies exist to extract carbon dioxide from the atmosphere, and new companies are entering the field. But can CO2 ‘air capture’ scale up from a niche business to an industry that will lower atmospheric concentrations of CO2?

TransCanada, the company behind the now-defunct Keystone XL, is proposing another pipeline that would ship Alberta tar sands oil to Canada’s Atlantic coast. But fierce opposition from First Nation communities could derail this controversial project.

The emission pledges from the world’s nations still fall short of the goal for limiting global warming. But as negotiators convene in Paris this week, there is cautious optimism that a significant international agreement on climate can be reached.

High-tech batteries may be garnering the headlines. But utilities from Spain to China are increasingly relying on pumped storage hydroelectricity first used in the 1890s to overcome the intermittent nature of wind and solar power.

As temperatures rise, the world’s iconic northern lakes are undergoing major changes that include swiftly warming waters, diminished ice cover, and outbreaks of harmful algae. Now, a global consortium of scientists is trying to assess the toll.

The Northern Cheyenne are opposing a proposed railroad that would cut through their ancestral lands to haul Montana coal to the Pacific coast for export. An e360 video reports on the Cheyenne’s fight against the railroad and the extraordinary coalition of tribal people and ranchers who have joined together to stop the project.

It took a committed coalition and the increasingly harsh reality of climate change to push President Obama to reject the Keystone XL pipeline. But sustained public pressure will now be needed to force politicians to take the next critical actions on climate.

Innovative projects in California are using flooded rice fields to rear threatened species of Pacific salmon, mimicking the rich floodplains where juvenile salmon once thrived. This technique also shows promise for growing forage fish, which are increasingly threatened in the wild.

In a Yale Environment 360 interview, Australian scientist and author Tim Flannery explains how the development of technologies that mimic the earth’s natural carbon-removing processes could provide a critical tool for slowing global warming.

Rare and extensive reefs of glass sponges are found only one place on earth — a stretch of the Pacific Northwest coast. Now, efforts are underway to identify and protect these fragile formations before they are obliterated by fishing vessels that trawl the bottom.

After spreading across Pennsylvania, fracking for natural gas has run into government bans in the Delaware River watershed. The basins of the Delaware and nearby Susquehanna River offer a sharp contrast between what happens in places that allow fracking and those that do not.

As solar and wind power grow, another renewable energy source with vast potential — the power of tides and waves — continues to lag far behind. But progress is now being made as governments and the private sector step up efforts to bring marine energy into the mainstream.

Scientists are becoming increasingly concerned about the fate of the huge boreal forest that spans from Scandinavia to northern Canada. Unprecedented warming in the region is jeopardizing the future of a critical ecosystem that makes up nearly a third of the earth’s forest cover.

In an interview with Yale Environment 360, the Rev. Lennox Yearwood — a social and environmental activist and the head of the Hip Hop Caucus — explains why it’s vital that the climate and environmental movements become far more diverse.

Amid tensions between the U.S. and China, one issue has emerged on which the two nations are finding common ground: climate change. Their recent commitments on controlling emissions have created momentum that could help international climate talks in Paris in December.

Rapidly rising temperatures, changes in precipitation, and increased lightning strikes are leading to ever-larger wildfires in the northern forests of Alaska, Canada, and Siberia, with potentially severe ecological consequences.

On ancestral lands, the Fond du Lac band in Minnesota is planting wild rice and restoring wetlands damaged by dams, industry, and logging. Their efforts are part of a growing trend by Native Americans to bring back traditional food sources and heal scarred landscapes.

The concept of the "solar suburb" includes a solar panel on every roof, an electric vehicle in every garage, ultra-efficient home batteries to store excess energy, and the easy transfer of electricity among house, car, and grid. But will the technological pieces fall in place to make this dream a reality?

The first runner-up in the 2015 Yale Environment 360 Video Contest captures stunning images of the abundant sockeye salmon runs in Bristol Bay, Alaska, and tells the story of a 70-year-old project that has been studying the millions of salmon that annually pour into the region’s rivers to spawn.

More than half a century after scientist Rachel Carson warned of the dangers of overusing the pesticide DDT, conservative groups continue to vilify her and blame her for a resurgence of malaria. But DDT is still used in many countries where malaria now rages.