IT IS a selfish world, so if you want people to about care about climate change, make sure their efforts are appreciated.
That is the conclusion of games organised by Jochem Marotzke of the Max Planck Institute for Meteorology in Hamburg, Germany, and his colleagues. They gave 154 undergraduates €12 each and asked them to donate none, some, or all of it to a climate change cause. The students could keep any money left over and were told that the donations would be used for a real advertisement about climate change.
The students gave more when their identities were made…
