Fact 1: Biofuel is used to produce electricity by burning.

Fact 2: Among the energy sources referred to as biofuels is garbage.

Given the two facts above, answer the question "Burning garbage can be used  to produce what?" with the following options: 
- warmth
 - heat energy
 - a slowing of global warming
 - gold
 - electricity
 - adding heat
 - mutant protection
 - carbon dioxide


 

     electricity    