<span>It is not true that environmental impact statements are managed by Congress. While the Congress does have the power to order that an environmental impact statement be performed, independent agencies exist which are charged with producing them. At the Federal Level this is most commonly the Environment Protection Agency, but other agencies produce such statements from time t time.</span>
Answer:
1 They can help the digestive system break down food
2 they can help you fight off germs
Explanation:
Carbon Dioxide (or CO2) is produced by the lungs I think because when you inhale, you breathe in oxygen, then you exhale the carbon dioxide in the lungs. That's actually 3 and 4. As for number 2, I want to say either the alvioli or however that's spelled but technically, the entire body uses oxygen so I'm not sure.
They consist of double-bond and single bond, according to the type of DNA.