Increased competition is the effects of population increase and resource depletion
Explanation:
When there are many individuals in a population or community sharing limited resources, then there is bound to be intense competition, for the resources, between the individuals. This competition results in the survival of those individuals with the slightest advantage over others in acquiring the resources. The fittest survive while the weak perish. The numbers in the population / community will decrease to the carrying capacity that the limited resources can accommodate and sustain.
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As the population increases, the amount of resources are depleted. Inadequate resources makes the population growth to stop. With a high population, death rate increases due to starvation and diseases which spread more easily in a large population. There may be a decrease in birth rate due to fewer matings and abortions resulting from social stress.
reason being that if you've studied the carbon cycle, you know that carbon goes into the atmosphere and is absorbed by plants. but if we produce more CO2 than plants can absorb, it causes more rays from the sun to be concentrated to the earth, rather than being reflected away
