Answer:
D
Step-by-step explanation:
Let's explain all of them:
A - Cutting down trees and forests
Trees are the things that take in carbon dioxide, so if we cut them then more carbon dioxide will go into our atmosphere.
B - Burning fossil fuels
Self-explanatory, burning fossil fuels will release Carbon dioxide into the air
C - Using a car
Using a car will release less gas because a car can carry at least can have in 5 people. But if that 5 people use a motorbike (they emitted far more smog-forming hydrocarbons and oxides of nitrogen, as well as the toxic air pollutant carbon monoxide) it would release greenhouse gasses into the air than cars.
Plus there are cars that use electricity which is eco-friendly
D - Wasting less food
About 6%-8% of all human-caused greenhouse gas emissions could be reduced if we stop wasting food. In the US alone, the production of lost or wasted food generates the equivalent of 32.6 million cars' worth of greenhouse gas emissions.