Thorium-229 is a highly radioactive isotope. use the chart to determine the half-life of th-229. a) 7,340 years b) 8 years c) 16 years d) 22,020 years

sup bro, im dumb, but this is what i found xd

"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"