Geoengineering includes A variety of large large scale efforts do you reverse global climate change. One Geoengineering concept involves releasing large amounts of iron containing fertilizers into oceans. The increased concentration of iron and ocean water would theoretically increase the rate of photosynthesis carried out by phytoplankton. Why are such ideas controversial? A. Scientists cannot predict what other unintended affects large concentrations of iron may have
B. Photosynthetic algae would remove carbon dioxide from sea water but not from the atmosphere
C. Scientists cannot agree whether carbon dioxide in the atmosphere relates to global climate change
D. Photosynthetic algae would increase, not decrease, atmospheric carbon dioxide