Some of the world's richest billionaires each emit about 3 million metric tons of carbon dioxide on average per year, more than 1 million times the amount emitted by 90% of people, according to a new study.
The sample consisted of 125 billionaire with investments in 183 corporations, and who have a combined corporate equity value of $2.4 trillion. About 50 to 70% of their emissions stem from their investments.
