Which of the following is not a man-made cause of global warming ?

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called

other information encoded in your genes might distinguish you from the others in the group