Burning of fossil fuels has the greatest impact on the

Carbon is removed from the atmosphere through

Which is the possible path of movement of nitrogen?

Movement of nitrogen from the atmosphere to soil can be accomplished by

This process is responsible for excess nitrogen and phosphorus entering streams and oceans.

Which of the following is contributing to an overload of the carbon cycle?

Which element below is contributing to the significant increase in global temperature

The most abundant element in the atmosphere is

Which of the following nutrients can be a limiting nutrient because it has to be removed from the atmosphere in placed into the soil by bacteria before plants can use it?

Use of agricultural fertilizers adds excess _____ to ecosystems and can cause eutrophication of waters.

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