In the 1800s many south american countries gained independence from spain through the of. a. toussaint l'ouverture. b. eva peron. c. miguel hidalgo. d. simon bolivar

In the 1800s many South American countries gained independence from Spain through the help of Simon Bolivar. The correct option among all the options that are given in the question is the last option or option "D". I hope that the answer has come to your help.

The correct answer is - b. millions of coal fires and stagnant air caused toxic fumes to build up in the air.

The situation with the air pollution in London in 1952 became extremely alarming  and it was a disaster for the city and its residents. This extreme pollution was given the name ''killer fog''. The ''killer fog'' was a result of the millions of coal fires which were letting out in the air extremely high amounts of carbon dioxide and carbon monoxide, as well as lots of toxic heavy particles, which in turn made the air much heavier, and the air became mush more stagnant as well, so it was pretty much not going anywhere but just building up in the city.