Which of the following environmental risks is most likely to lead to digestive health issues?
a. meat contamination
b. air pollution
c. fertilizer use
d. none of the above

indium, and thallium have three electrons i think

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.