Question

One reason scientists are trying to develop fuel sources from corn and sugar is because _____.

Answer 1

There are quite a few answers to that actually.
1, Its easy to source
2, It reduces greenhouse gasses
3, Lower levels of pollution 

Answer 2

Answer

all of the above.

Explanation:

Its all of the above because these sources are renewable

fossil fuels are being depleted

these crops can be widely grown