Greenhouse Gases

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.

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.