Compare and contrast the systems of flatworms to the systems of sponges and
cnidarians. Use the terms circulatory system, respiratory system, and excretory system
in your answer.

Explanation is in the file

cutt.ly/rzNrBcz

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: