Which of these is an environmental effect of building dams? a)increased water temperature upstream b)increased fertility downstream c)weed growth upstream d)sediment builds up downstream

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.

answer; talc and gypsum;