HELP
13 POINTS
How do we know what animals from millions of years ago look like?

fossils

Explanation:

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

not sure if this what   you'r looking for would be percent composition