Which of the following is not a consequence of fossil fuel use? a. increased concentrations of atmospheric carbon dioxide
b. destruction of wildlife habitats
C. leaching of waste into groundwater
d. none of the above

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.