Everybody is talking about "climate change" and "global warming". But what is global warming, actually?
Seen from space, our atmosphere is but a tiny layer of gas around a huge bulky planet. But it is this gaseous outer ring and its misleadingly called greenhouse effect that makes life on Earth possible - and that could destroy life as we know it.
Carbon dioxide is the number-one reason for man-made climate change. But what is carbon dioxide, actually? Where does it come from? And why are governments and businesses now scrambling to reduce their carbon dioxide emissions?
The latest Intergovernmental Panel on Climate Change report delivered a huge blow to global warming skeptics. Leading climate scientists are now 90 percent sure that human activity is heating up the planet. They present various scenarios that show where global warming could take us by the end of the century.
Stanford University climatologist Stephen Schneider discusses what we know and don't know about the future of the Earth's climate.
The Belgian civil engineer, explorer, and environmentalist alain Hubert explains why the world's last frontier is in danger, and why polar ice is so important in the global climate system.
Staple foods are more expensive than ever. But with fears over a recession, will politicians and executives be too busy to address the problem at the World Economic Forum?
