In some cells, a cell is outside the plasma membrane

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere

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

This is collection of data made by comparing objects in standard units. in science, the units are metric.