Health is not just about a person's diet, fitness, and genes. Life expectancy, or how long people are likely to live, is also a reflection of the society in which people live. A society's culture, politics, economy, and access to health care all have a tremendous impact on people's health. Health examines the positive changes taking place around the world. People are working to bring better acc…
Energy use is one of the key issues of our time. People have traditionally relied on fossil fuels, including oil, coal, and natural gas. There are growing concerns, though, about the pollution caused by these energy resources. In addition, these sources of energy are nonrenewable. That is, they can be used up. Countries around the world are exploring ways to use renewable sources of energy, suc…
Water is an essential resource for life on Earth. Considering how vital and precious water is, it is almost unbelievable that it can be used so carelessly. Sewage, toxic chemicals, fertilizers, pesticides, oil, metals, and solid trash pollute the water in lakes, streams, and oceans around the world. Water Resources explores the ways in which water on Earth has become polluted--and what people a…
Pollution is growing problem around the globe. Used chemicals, old appliances, exhaust fumes, and plastics are just a few of the things that cause pollution on our planet. "Pollution" examines how water, soil, and the atmosphere have become increasingly polluted and the impact that pollution has on people’s health. In the face of these challenges, people and countries have cooperated to clean…