Question

Most of the carbon dioxide entering the atmosphere today

is produced by which one of these?
respiration in animals
combustion of fossil fuels
decomposition in swamps
photosynthesis in plants

Answer 1

combustion of fossil fuels

Step-by-step explanation:

greenhouse gas levels are so high right now primarily because we have released them into the air by burning fossil fuels. the gases absorb solar energy and keep heat close to Earth's surface, rather than letting it escape into space. that trapping of heat is known as the greenhouse effect.