Explain how dna polymerase "proofreads" a new dna strand

What are two ways in which waves erode the land?

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

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?