How do fossil fuels contribute to air pollution? A. by releasing carbon dioxide into the air
B. by recycling oxygen
C. by reversing the greenhouse effect
D. by releasing nitrogen into the air

A) releasing carbon dioxide into the air

protein makes up the building blocks of organs, muscles, skin, hormones and pretty much everything that matters in your body.

some choices are:

peanut butter

seeds

eggs

yogurt

meats

fish

so pretty much meat, dairy, nuts, and grains.

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.