Hardwood Trees: Identifying the Most Common Species Use leaves, fruit, and flowers to identify types of hardwood trees.

Gasoline Gallon Equivalents (GGE) are used to determine the amount of energy produced by alternative fuels compared to that of one gallon of gasoline.

A climax forest is filled with trees that are considered the last stage of succession for that region. Learn more about this special type of forest.

Electric cars hybrids rely upon electric motors for propulsion and assistance. Here is a look at how these motors and generators work to generate power.

Two species of sloths are endangered according to the IUCN Red List. Learn about conservation efforts and how we can help restore sloth populations.

15 Smokey Bear posters were created in the mid-1980s for a major state and federal fire prevention campaign. Explore the collection and their message.

Here are maps showing locations of broad types of forest cover by tree types according to frequency of occurrence in the native range.

The Food and Agriculture Organization of the United Nations has maps of major world forests. These maps represent current global forest cover.

Learn how composting toilets work, different types, maintenance tips, how to use them, and what happens to the waste in a composting toilet.

Cultivating the land for farming requires testing your soil, improving it, tilling the soil and ensuring proper fencing.

Learn how to identify the yellow poplar tree, including facts about its habit, range, management, and more.