<span>Heavy metals like mercury enter waterways by industrial dumping and poor regulatioin of effluent, and they also enter soil through a similar manner, in which waste is disposed of imporperly. Another source of heavy metals are the gases leaving industry carrying these metals. The metals fall as a solid on to soil and water ways. Therefore, the answer is D.</span>
Answer: D (The abundance percentage of each isotope)
Explanation: hope this helps!
Your answer would have to be #3
Answer:Switch off lighting in refrigeration areas when not in use?
Explanation:
I believe the answer is D
