The main cause of the increase in the amount of CO2 in Earth's atmosphere over the past 150 years is
A)increased worldwide primary production.
B)increased worldwide standing crop.
C)an increase in the amount of infrared radiation absorbed by the atmosphere.
D)the burning of larger amounts of wood and fossil fuels.
E)additional respiration by the rapidly growing human population.

Question

Quizplus · Accepted Answer

The burning of larger amounts of wood and fossil fuels has led to an increase in the release of CO2 into the atmosphere over the last 150 years. This is due to the fact that wood and fossil fuels are carbon-based and when burnt, they release CO2 as a byproduct. This is the main reason for the increase in atmospheric CO2 levels.

The Main Cause of the Increase in the Amount of CO2