How human activities increased the supply of fixed nitrogen available to the primary producers?

How do human activities contribute to pollution of air?

How do human activities affect nitrogen cycle?

How is the regular supply of nitrogen manitained to plants?

How Human activities lead to produce the green house effect?

How human activities caused an imbalance in biogeochemical cycles?

How have human activities caused desertification ? Explain.

How have human activities caused desertification ? Explain.

How have human activities caused desertification ? Explain.

An ecosystem recieves 1,000,000 joule of incident-solar energy, then what is the energy available for primary producer level ?