The answer would be about 18.
<span>Christmas trees give, in fact, a lot of oxygen and in return they consume a lot of carbon dioxide.
</span><span>The oxygen produced by each tree depends on several factors, but there is a estimative. In about 1 acre of land, there are enough trees to produce the oxygen necessary for 18 people to breath during a whole year!
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The word that you are looking for is complex.
Answer:
Solar Energy
Explanation:
I know Hydroelectric Energy is the largest, but I'm not sure about this.
Please tell me if I'm wrong.
Answer:
As humans require a lot of nutritious food for the growth, same way plants also require nutrients in order to grow. Plants which are grown in the soil gets all the required nutrients from the fertilizers and from the land where natural nutrients are stored.
