New hope that people around the world can work together to combat global warming has come from a new theoretical study.

Those who resort to punishment are losers British sense of fair play proven by science Science explains Christmas goodwill A team has been using "game theory" - where mathematics is used to capture how people deal with each other - to show that a classic problem that undermines the ability of individuals to cooperate can be overcome, if people are diverse enough, as is the case when it comes to the 6.5 billion citizens of planet Earth.