Question

How much has the atmospheric concentration of carbon dioxide increased since the Industrial Revolution (taken as 1750)?

Pick an answer

1%

5%

10%

25%

40%

Submit

Other questions

• Approximately how many preventable deaths occur per year in America, due to lack of health coverage?

  33,051 answers

• The Commitment to Development Index ranks the 27 richest nations on how much their policies benefit poor countries. Of these 27 nations, where did Canada rank on environmental protection in 2013?

  13,596 answers

• How many years would it take a minimum wage worker to make what each of the Koch brothers makes in one hour?

  13,425 answers