Ifeel like the answer is number 4 but im not sure. what was the key factor in creating the earth's early atmosphere? respiration of single-celled organisms photosynthesis of land plants violent storms outgassing by volcanoes

Which process can increase the rate of greenhouse gas emissions into the atmosphere in response to a decrease in albedo

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

Aremote community desperately needs more electrical energy. it is located in an area with the following characteristics: average wind speed of 15 – 20 km/hr some medium-sized rivers with slow-moving currents few coal deposits some oil exploration being conducted within 400 miles based on the above information, which energy source would be the most economical and safest for the community to pursue? a. fossil fuel b. hydroelectric c. nuclear d. wind