Much less than one percent of the Earth’s water is available for human use. This still represents a huge amount of water. This water is not distributed evenly over the planet. Areas that have large water needs may have to bring water in fr... Read more

People use many of the Earth’s natural resources. All of the products we use have a natural resource base. Minerals, forest products, water, and soil are just a few of the natural resources humans use to produce energy and make things peop... Read more

Life on Earth is possible because energy flows one way through ecosystems, while matter cycles endlessly. Water and elements, such as carbon, nitrogen, phosphorous, and sulfur are examples of matter that cycle through ecosystems.  The original s... Read more

Acid precipitation has been an important environmental topic for many years. What is acid precipitation? Acids are an important group of chemicals. All acids contain chemicals that are combined with hydrogen in a specific way. Acids are present... Read more

 Scientists have shown that the Earth’s average temperature has risen slightly in the last few decades. But, not all scientists agree on what changes this will bring in Earth’s climate.  The Earth has gone through many cycles of warm... Read more