Hypothesis that cannot be tested is always considered

20 points and brainlist 1. london has suffered from terrible air pollution for at least seven centuries. why is the city so prone to its famous “london fog? ” what did london do to get rid of its air pollution? 2. why does air pollution cause problems in developing nations more than in developed ones?

The chemical form of energy that is useable by the cell to do work

Which of the following is a testable hypotheses?