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examine the chemical elements in Ice Age look into the pattern of solar wind activity analyze the composition of different trees find out the origin of carbon-14 on earth
examine the chemical elements in Ice Age look into the pattern of solar wind activity analyze the composition of different trees find out the origin of carbon-14 on earth
It affects the growth of trees. It has been increasing since the Ice Age. It is determined by the chemicals in the air. It follows a certain cycle.
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examine the chemical elements in Ice Age look into the pattern of solar wind activity analyze the composition of different trees find out the origin of carbon-14 on earth
The lifecycle of trees The number of trees The intensity of solar burning The quality of air
examine the chemical elements in Ice Age look into the pattern of solar wind activity analyze the composition of different trees find out the origin of carbon-14 on earth
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