How will the level of carbon in the atmosphere change if humans do nothing to reduce their impact on the carbon cycle?

Cells of an organism tell each other when predators are near.

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey