greenhouse gases

These trucks will soon deliver cleaner air

Trucks move 70 percent of U.S. freight, but they emit as much CO2 as 130 coal plants. That’s why President Obama's new fuel-economy standards are crucial.
Children playing in fountain (© AP Images)

Scientists’ annual physical of the planet: Earth’s fever rises

Earth’s fever got worse last year, breaking dozens of climate records, scientists said in a massive report that's called the annual physical for the planet.
Drop of water hanging from melting iceberg (© AP Images)

U.S. agencies have a new tool for addressing climate change

A new directive requires U.S. federal agencies to quantify greenhouse gas emissions and environmental impact before starting projects.

Almost everybody’s in … high participation raises spirits before climate summit

At COP21, participating countries are planning on adapting to and slowing the effects of climate change. Do you know what your country is pledging?

Once smog-shrouded, LA has improved its air quality

Over the past few decades, Los Angeles has learned techniques to improve air quality that could benefit other major cities around the world.

Need strategies to clear the air? Ask a megacity.

Big cities have big problems with pollution and are big laboratories for solutions. C40 Cities helps them collaborate on strategies.

The greening of the bottom line

More companies are introducing sustainable practices into their manufacturing processes and products, helping the environment and improving profitability.