What human activity would have the most significant effect on the temperature of the earth? A) deforestation B) producing smog C) producing CFCs D) burning fossil fuels

Answer: Option D

Explanation: There are many human activities that significantly affects the temperature of the earth. The burning of fossil fuels is one of the most significant activity.

This aids in rising the global temperature of the earth. The burning of fossil fuel releases harmful gases like nitrogen oxide, carbon monoxide, carbon dioxide into the environment that contributes in green house gases.

This affects the global temperature.

D. burning fossil fuels