47.5k views
22 votes
Which research question is most effective?

A. How did natural gas affect the ozone layer in 1975?

B. How do fossil fuels affect the atmosphere?

C. When were fossil fuels first discovered?

D. What are fossil fuels?

User Plmrlnsnts
by
3.1k points

1 Answer

11 votes
All you have to do is copy and paste in the research bar
User Epochengine
by
3.4k points