Answer:
Sewage Treatment Plants
Explanation:
Just did the test sorry its so late man.
Oxygen , Carbon , hydrogen
Answer: I believe you need to examine the layers, the color, texture.
Answer: Up
Explanation: when an electron goes up it produces more energy which makes light. :)
<span>They can rais the number of crops produced in an amount of time, they can also reduce the need for harmful pesticides. However, they may cause more allergies in humans, producing a health risk.</span>
