Chapter 28.4, Problem 1CYL

Summary Introduction

To explain:

The way in which human activities have disrupted nutrient cycles.

Introduction:

Population of humans is growing very rapidly and the development of new technologies has greater impact on nutrient cycles. The activities of humans include burning of fossil fuels and use chemical fertilizers that has disrupted the nutrient cycles. The agricultural demand of a growing human population leads to the excessive use of fertilizers containing phosphate, nitrogen, urea, and so on.

Summary Introduction

To describe:

The way in which human interference with nutrient cycles causes acid deposition, damages aquatic ecosystems, enhances the greenhouse effect and causes climate change.

Introduction:

Human activities that include use of fossil fuels and chemical fertilizers has disrupted the global nutrient cycles. The agricultural demand of a growing human population leads to the excessive use of fertilizers containing phosphate, nitrogen, urea and so on. Overuse of these chemicals to the farm lands results in change in climate and acid deposition.

Summary Introduction

To describe:

Some of the evidence that Earth is warming and some of the impacts of climate change on Earth’s ecosystems.

Introduction:

Activities of humans increased the greenhouse gases such as carbon dioxide which increases the greenhouse effect. For, Earth’s atmosphere to remain constant, the amount of energy that enters and leaves the Earth’s atmosphere should be equal.