Read the two statements and choose the correct option.

I. Carbon dioxide in the air has risen steadily since the industrial revolution.

II. Ozone depletion and global warming are the same problem.

Explanation

1. 01

   Burning fossil fuels has raised carbon dioxide steadily: I is true.

2. 02

   Ozone depletion is the thinning of the ozone layer by CFCs; global warming is heat trapped by greenhouse gases. II is false.