Their entry into the war boosted the morale of the other allied nations. Morale completely depleted seems how the war was ultimately a stalemate and lives were being lost needlessly. American entry into the war also discouraged the Axis powers, and later after America's entry the Axis powers began to drop deeper into fear. America was the turning point for the war. The Axis powers were winning and if it weren't for America, then the Axis powers would have prevailed and the world would not be the way it is today. (This is what I think about it, it might not be entirely correct.)
Answer:
The balance of oxygen and carbondioxide is maintained in the atmosphere by the oxygen released by plants during photosynthesis and carbondioxide released by human,animals etc. in the atmosphere. ... The balance of oxygen and carbondioxide is made due to respreration and photosinthesis
Explanation:
Develop cost-efficient methods to use solar energy
Improve fuel efficiency in automobiles
Increase the use of wind power
Reduce the use of coal and oil
Hope this helped!!