Under what conditions would you expect abrasion to cause the most erosion of a riverbed

What is a cordon and where is it found

Name the glands associated with human digestive system

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?