environmental aspects

Examines the causes of acid rain, its damaging effects on the environment, and ways of reducing the emission of pollutants into the air.

Introduces the food cycle and its importance, including how plants manufacture food, the plants, animals, bacteria, and fungi that make up the food cycle, and the fragile balance between feeding the world's human population and preserving the balance of nature.

Discusses the ecological balance of life in the world's oceans and how it is endangered by ocean pollution.

Provides an account of the oil spill disaster that occurred in the Gulf of Mexico in the spring of 2010 when an offshore oil rig exploded, and explains what oil is, where it comes from, and why it is needed.

Examines the use of pesticides, how they became so popular, the health problems they can cause, and how you can protect yourself against them.

Explains the causes of climate change and how scientists gather data about global warming. Also describes the different ways people and nations are combating climate change, and provides examples of how people and animals are adapting to a new climate.

An exploration of climate change that discusses scientific evidence for it, its effects on land, sea, and wildlife, and what can be done to stop it.

Contains an examination of the issues related to managing America's forests and trees, providing information from primary and secondary sources such as journals, eyewitness accounts, government documents, and newspaper articles that provide a wide range of perspectives on environmental issues.

Explores the development of farming and agriculture over time, the impact that they have on the environment, and what can be done to lessen that impact.