Question

Use of which of the following does not contribute carbon dioxide to the environment

(1. refrigarator
(2. charcole grill
(3.computer
(4.bicycle

Answer 1

Choices 1, 2, and 3 all emit carbon dioxide, not enough to destroy the planet, but they still can cause it over a large amount of time, due to Carbon Dioxide being a greenhouse gas. Therefore, the answer is 4. Bicycles do NOT emit any carbon dioxide at all.