Answer:<u> </u><u>The correct option is B:</u>
<em>Each year.CO2 level increases at a faster rate. Over the past 50 years, it has nearly doubled.</em>
In "<em>An inconvenient truth</em>", A1 Gore illustrates clearly how the levels of CO2 has been increasing rapidly in the atmosphere since 1958, and proves that the increasing of the carbon dioxide emissions are a result of human actions. He explains this theory by presenting the Keeling curve, which shows that the last 14 years were the hottest ever recorded in the atmosphere, as well as other important studies proving the correlation between global warming and hurricanes.
Talk about how many have come through the years.
For example: Many immigrants have entered (whatever country, I'd assume America but you can fill in the blamk) but by far the most that have entered would be (number here) and (this percent) have stayed and.....
And if not that, maybe talk about how their cultures have affected the world or another country because of immigration. I hope that helps!