Gases released during the use of fossil fuels causes global warming.
Oil is a fossil fuel.
Gases released during the use of oil causes global warming.
Gases released during the use of oil causes what?

[1] global warming
[2] better weather on the earth
[3] colder weather
[4] less oily air
[5] The atmosphere
[6] flooding
[7] Temperature
[8] cleaner air to breathe