True or false. since the 1970s, many nations have entered into treaties to control the occurrence of acid rain, the thinning of the ozone layer, and the dumping of toxic waste into oceans.

Hi!

The answer to your question would be that this is true.

Explanation:

Acid deposition started in North America and eurooe after WWII when those regions increased their consumption of fossil fuels.

In 1972, the United Nations Conference of the Human Environment addressed the issue and in 1979 the Geneva Convention on Long-range Transboundary Air Pollution created the framework for reducing air pollution and acid deposition in Europe.

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.