D. All of its wavelengths are harmful
This is false, because a lot of electromagnetic radiation (such as visible light we see with our eyes) is not harmful.
<span>If you place flaccid plant cells in pure water, water moves into the cell because it has a lower concentration of a solution than a concentration inside the cell. This solution (pure water) is called hypotonic solution. As a result, the cell is swelling.</span>
We have polluted it— the air, water and the ground.
Some people have tried to clean up the environment
If you compare them, Denver has a much colder climate.
