When light mass nuclei combine to form a heavier more stable nucleus this is called

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

elements make up everything, and they combine to make compounds.

the answer is c

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.