The correct answer is D. Use of CFCs
CFCs are very dangerous for the environment and destroy the atmosphere which in turn lowers air quality. They are commonly known as Freon due to a brand of CFCs found in fridges.
Answer:
(This is only very brief)
Environmental issues are created by the earth as a whole which includes all the countries within it therefore making environmental issues global issues. No country alone has caused global warming. This also means that no country alone is able to single-handedly defeat an environmental issues which have now spiralled out of control. No one has enough resources, that's why it would be better if there was a global intervention for environmental issues because the more brain power and resources, the better.
It's called the Social Security Trust Fund, and it's typically taken directly from wages. If you ever get a job, on your pay stub there will be a deduction that's usually just called "SOCIAL SECURITY". So, largely payroll taxes.
The Ob River flows through B. Siberia, Russia. It is the world's seventh longest river.
