Simple, we weren't around during that time, so we made theories and conclusions to when life evolved on earth.
I believe that the correct answer would be CO2.
Answer:
The Indian Ocean
Explanation:
The Indian ocean is the inlet for the Red Sea
Two examples of an advocacy campaign:
Earth hours - This campaign was started in Australia to promote and protect the environment. ...
Sweetie - This campaign was directed to tackle the sexual exploitation problem and global child trafficking, through a computer-generated child called sweetie.
It uses a creative and unique technique to get people's attention.
Answer:
fastest in rivers, slowest in groundwater
Explanation:
For rivers, lakes and groundwater, self-purification is fastest in rivers and slowest in groundwater.
When groundwater becomes contaminated, it tends to remain contaminated because the dissolved oxygen levels are low or non-existent.
