Consumption, not crowd, is key to climate change

The world is getting hotter and more crowded and the two issues are connected, but not quite as much as people might think, experts say.

On Nov 15, a baby was born that became the globe’s 8 billionth person, according to a projection by the United Nations and other experts. The Earth has warmed almost 0.9°C since the world hit the 4 billion mark in 1974.