Human activities, including the use of fossil fuels, have contributed to global warming and the rise in sea levels. Both of these environmental changes are
threatening ecosystems and human communities worldwide. How could
governments best cooperate to use treaties to mitigate this problem?
A. They could agree upon limits for emissions of environmentally
damaging substances.
B. They could study climate change on other planets to predict its
effects on Earth.
O C. They could set regulations in their own countries that protect local
resources.
D. They could increase their use of fossil fuels to help get rid of the
problem's source.