Climate activists take to streets as U.N. talks kick off
Climate action in Paris Sunday had two faces, but both were focused on "system change, not climate change"
UN climate talks 2015
Negotiations are leading toward a new global deal in Paris in December 2015 to curb climate changing emissions and help poorer nations adapt to climate impacts. Will an ambitious deal be agreed?
5 facts you need to know about malaria in Africa
Malaria is estimated to cost Africa more than $12 billion every year in lost GDP, but could be controlled for a fraction of that sum. Here are 5 facts you need to know about malaria in Africa
Extreme weather
Extreme weather, from worsening hurricanes and cyclones to more droughts, floods and heatwaves, is causing problems around the world. What can be done to cope?