Our atmosphere traps some of solar radiation as a greenhouse, which increases the planet's temperature

Seth Borenstein

Arctic monitoring stations show carbon dioxide levels are now above 400 parts per million. Carbon dioxide is the chief climate-change gas and stays in the atmosphere for 100 years.

Jonathan Watts

Money will be invested in building transport systems that will reduce greenhouse gas emissions

Fiona Harvey and Damian Carrington

Ministers attending clean energy summit in London to be gravely warned about continuing global addiction to fossil fuels

Experiments may dramatically underestimate how plants will respond to climate change in the future.

Nina Chestney

LONDON, May 8 (Reuters) - Rising carbon dioxide emissions will cause a global average temperature rise of 2 degrees Celsius by 2052 and a 2.8 degree rise by 2080, as governments and markets are unlikely to do enough against climate change, the Club of Rome think tank said.

David Fogarty

SINGAPORE, Jan 30 (Reuters) - Extreme heat can cause wheat crops to age faster and reduce yields, a U.S.-led study shows, underscoring the challenge of feeding a rapidly growing population as the world warms.

David Fogarty and Deborah Zabarenko

* Rising population, development put more in harm's way

* Policymakers urged to act in next few decades

* Less emphasis on mitigation, more on cutting risk

By David Fogarty and Deborah Zabarenko  

Richard Black

An eminent UK engineer is suggesting building cloud-whitening towers in the Faroe Islands as a "technical fix" for warming across the Arctic.Scientists told UK MPs this week that the possibility of a major methane release triggered by melting Arctic ice constitutes a "planetary emerge

Brian Vastag

With global efforts to reduce carbon dioxide emissions stalled, the United States and five other countries are starting a new program to cut other pollutants — including methane, soot and hydrofluorocarbons — that contribute to global warming.