Question

Researchers are trying to use iron to stimulate phytoplankton growth. Phytoplankton removes excess carbon from the atmosphere because too much carbon makes the earth warmer. If the researchers are correct, adding iron to stimulate phytoplankton

will keep Earth’s temperatures constant.

can eventually make the Earth’s temperatures warmer.

can eventually cool the Earth’s temperature.

can reduce the amount of iron in the water.

will have no effect on its growth.