Which of the Following Possible Actions by Nations to Reduce

Multiple Choice

Which of the following possible actions by nations to reduce the warming of Earth's atmosphere would be best supported by the global scientific consensus?

A) drastically reducing human-based sources of CO₂ emissions
B) re-forestation of areas which have been logged or clear-cut
C) increasing the thickness of the ozone layer above Antarctica by reducing chlorine concentrations
D) restoring marine ecosystems in order to increase their absorption of carbon dioxide