Test your knowledge of this important waste management method by taking ENN's recycling quiz. Few animals in the wild stir human emotions, positive and negative, in quite the same way as the wolf. Shrewd predators, doting parents and playful pranksters, these majestic animals symbolize the true wildness of nature to many people. But to others, wolves represent a threat to human livelihood. Test your knowledge of these remarkable animals by taking ENN's wolf quiz.
Proper nutrition is a mainstay of a healthy lifestyle.
Paying attention to what you put in your mouth will not only keep you from gaining weight, good eating habits can also reduce the risk of many chronic diseases, including cancer, diabetes, stroke, osteoporosis and heart disease. See how much you know about proper nutrition in ENN's Healthy Eating Quiz. The power of water has been used over the last two millennia to help grind grain, irrigate fields, drive sawmills, and, in the last century or so, generate electricity. While electricity created through hydropower is cheap, clean and renewable, blocking entire rivers for the sake of electricity has its environmental costs. Find out how much you know about hydropower by taking the ENN's Hydropower Quiz.