U.s. Department of Agriculture: Plant Growth and Osmotic Potential

View images of lichen, and learn what makes this microorganism able to live in extreme environments, how lichens are formed by algae and fungi, and how lichens might be able to benefit humans.

Information about agriculture and agricultural practice in America. You can explore specific states or issues that are national in scope. The "Growing a Nation" page helps you understand the role of the American farm in westward expansion.

The U.S. has enough coal to last for the next 200-300 years. So why are we not using more of it? This article describes the different types or "ranks" of coal, the history, and the problems with burning coal for energy.

The Office of Energy Research, a division of the U.S. Department of Energy, conducts energy research in various subjects from biological and environmental issues to nuclear physics, and results are published here.

The U.S. Department of Energy provides links pertaining to solar energy. Understand the current technologies and issues with this resource.

A good description of the growth and changes in plants from the seed through the adult plant. College level discussion that includes the chemicals involved in the regulation of plant growth.

Soybean oil isn't just only for cooking. Now scientists have turned it into a special oil used to run elevators -- including the one inside the Statue of Liberty.

Information about avian influenza and how it affects birds, including signs and symptoms of the disease and advice for avoiding spreading it.

Find information on everything from buying energy-efficient products to using the proper landscaping for particular climates to conserve resources. Starting with an energy assessment, this website will help users reduce their consumption...

This site has an overview of PV technology, impact, system application and design. Information is provided on how to select the best solar system for various needs.