You are presented with the question "Some light bulbs waste less of their energy producing what?" and the following answer choices: 
- O3
 - loss
 - SO2
 - heat
 - warmth
 - light
 - Green
 - motion

Now knowing that some light bulbs convert electricity into light and heat energy and cFLs waste much less electrical energy generating unnecessary heat, choose the best answer.


 

    heat     