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 Tuesday somewhere a baby will be born that will be the globe’s 8 billionth person, according to a projection by the United Nations and other experts. The Earth has warmed almost 0.9 degrees Celsius (1.6 degrees Fahrenheit) since the world hit the 4 billion mark in 1974.
