Question

How is carbon dioxide removed from the atmosphere, and then returned to the atmosphere?

Answer 1

Carbon enters the atmosphere as carbon dioxide from respiration and combustion. Carbon dioxide is absorbed by producers to make glucose in photosynthesis.

Decomposes break down the dead organisms and return the carbon in their bodies to the atmosphere as carbon dioxide by respiration.

Answer 2

ANSWER:

• Carbon dioxide is released from the earth through the earth's interior such as volcanoes, and by burning of fossil fuels and carbon materials.

• Again, Carbon dioxide returns to the atmosphere through organisms as they need it for respiration.

• Algae, plants, and microorganisms need carbon dioxide to respire.

EXPLANATION:

• Carbon dioxide is a greenhouse gas which is the main source of carbon for plants and trees.

• It helps to trap infrared radiation in the upper atmosphere, and also has a vital role in the ecosystem and weathering of the rocks.