How many grains of pollen does it take to fertilize an egg in a flower?

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:

cuz some people don't have enough food. that's why we need more ppl to donate food to the hungry.