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.

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.

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