The graph illustrates worldwide emissions of carbon dioxide and methane from 1990 to 2015. A student puts forward four claims about carbon dioxide and methane: • Carbon dioxide and methane were the only greenhouse gases emitted in 1990. • Carbon dioxide emissions are still increasing up to the present day. • Carbon dioxide has a larger impact on climate change than methane. • From 1990 to 2015, methane emissions stayed below carbon dioxide emissions. How many of these claims are backed up by the data?
- A1
- B2
- C3
- D4