After winning a Nobel prize for helping to protect the planet, Mario Molina is tackling a much more difficult problem

Review recommends better governance and transparency for the IPCC in the face of more public scrutiny.

Marathon flights test models with first pole-to-pole snapshot of trace gases.

With its plentiful sun, water and land, Brazil is quickly surpassing other countries in food production and exports. But can it continue to make agricultural gains without destroying the Amazon? Jeff Tollefson reports from Brazil.

A once-in-a-century drought struck much of the Amazon rainforest in 2005, reducing rainfall by 60–75% in some areas — and giving scientists a window on to a future coloured by climate change. The drought foreshadowed the Amazon drying that many climate modellers expect to see in a warmer world.

Many climate researchers worry that scepticism about global warming is on the rise. Jeff Tollefson investigates the basis for that concern and what scientists are doing about it.

To many people, modern agriculture, with its industrial-scale farms and reliance on petroleum-based fertilizers, may seem a necessary evil

It hasn't always been easy to get the White House to lead on climate change, so for years the question of how to incorporate global warming into long-range planning and public infrastructure in the United States has fallen to cities, states and individual federal agencies.

To control emissions, countries must first account accurately for their carbon. That will take considerable effort, reports Jeff Tollefson.

Hydrogen fuel-cell vehicles, largely forgotten as attention turned to biofuels and batteries, are staging a comeback. Jeff Tollefson investigates.