Why can't the earth just grow more food?

Low productivity.

Sometimes the land can produce more food with better practices but farmers struggle to grow more food and market their produce due to lack of skills and education. Governments also often invest very little money in improving their country's agricultural productivity.

Explanation:

A complimentary angle has to add up two angles to equal 90 degrees.

We have one angle which is 43.5 degrees, so all we have to do is subtract 43.5 degrees from 90 degrees to find the missing angle.

90 degrees minus 43.5 degrees is 46.5 degrees.

That means the missing angle is 46.5 degrees.