Which of the following are out of human control and can NOT be regulated to reduce CO2 levels.
volcanic activity
car emissions
deliberate forrest burning
powerplant emissions

covalent bonding is a form of chemical bonding between two non metallic atoms which is characterized by the sharing of pairs of electrons between atoms and other covalent bonds.

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.

dna is a set of a gene held together by a chemical bond

geographic isolation