During the 20th century, the rate of resource use has increased twice as fast as the increase in global population. Now, resources are being consumed at an even greater rate and are on pace to triple by 2050, the report calculates. Except there simply aren’t enough resources left on the planet to manage that. The average person in Canada or the United States currently consumes 25 tonnes of key resources every year, while a person living in India and in most African countries uses just four tonnes, the report found.