Predict how atmospheric carbon dioxide levels might change if more trees were planted on earth

Well, they would decrease depending on how many trees were planted.

Explanation:

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.