Algae are the major producers of oxygen that humans (and other living organisms) use for respiration.
Many food chains involving algae would be broken, but humans would still live because there are other sources
The greenhouse effect is crucial for the earth. It keeps the earth warm (about 13 degrees Celsius on average) and had done for millions of years.
mushrooms, marine algae, freshwater algae, other botanicals
Algae provides much of the earth's oxygen and their skeletons (especially diatoms) build up to make certain limestone.
All of them exhale carbon dioxide.
Algae produces more than 71% of the earth's oxygen. Some types of algae can live in snow. Some types of algae can live in boiling water.
Oxygen
There would be a larger population of algae on the earth.
since the earths been here
Humans live on the lithosphere, or the crust, of the earth.
water + earth= swamp fire + air= energy swamp + energy= life water + life = algae swamp + algae = moss moss + earth = grass
Because it produces oxygen for the world