Answer: I guess its to not put waste in the ocean or just pick it up by a team or yourself.
The adult heart pumps about five quarts of blood each minute so around 2,000 gallons<span> of blood each day.A typical athlete's heart churns out up to </span>eight gallons<span> of blood per minute.</span>
The smallest thing they study is cells, i think!
hoped this helped!!
What are the two primary sources of energy for the earth