What is the end result when the sulfur dioxide and nitrogen oxide ...

[PhilipSeeMore]

What is the end result when the sulfur dioxide and nitrogen oxide produced by burning fossil fuels react with the atmospheric moisture?
 
  A) the greenhouse effect
  B) global warming
  C) the destruction of the ozone layer
  D) acid rain

Question 2

Approximately how long did it take the world population to reach 1 billion, then each successive billion after that to reach the 6 billion mark?
 
  What will be an ideal response

[ambernicolefink]

Answer to Question 1

D

Answer to Question 2

The first billion was reached around 1800, followed by the second billion around 1930 (130 years), the third billion by 1960 (30 years), the fourth billion by 1975 (15 years), the fifth billion by 1987 (12 years) and the sixth billion by 1999 (12 years).

[PhilipSeeMore]

Wow, this really help

[softEldritch]

Thanks for the timely response, appreciate it