Which best decribes the puropse of a control sample?

What types of energy transfers and energy transportations are involved in the domino chain reaction?

What are the most explosive events that occur on the sun? umbras solar flares solar winds prominences

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?