Which ecosystem makes up approximately 70% of the earth's surface?

The answer is:  marine ecosystem (also known as salt water Eco system)

Explanation: marine ecosystem makes up approximately 70% of the earth's surface. This includes coral reefs, lagoons, mangrove forests, sea beds, Salt marsh, Estuaries and the list continues. They are found in various and in different geographic locations across the globe. Salt water ecosystems support nearly half of all Earth’s species and are a habitat to millions of creatures.  

the part i "agree with' is " it should not matter what color their skin is or what their cultural beliefs are." but for the main part i agree with it all or if cause now and days there are some people don't get the job cause there skin color and there beliefs and some times they don't even get the same repest as white people. we are all equal.