Allergens are all around us: in the air, on our pets, and in our food. According to USA TODAY, the Nation's No. 1 Newspaper, accidental exposure to food allergens leads to fifty thousand emergency room visits and causes at least 150 deaths in the United States each year. Some organizations estimate that allergies and asthma affect one in five Americans, and many people suffer from allergies their entire lives. There is no cure for allergies, but you...

Describes the physical features of a coral reef, its community of plants and animals, and environmental threats.

Briefly describes different types of grasslands, their plant and animal life, and environmental threats.

Describes what a rain forest is and what types of plants and animals reside there.

Examines swamps, marshes, and other kinds of wetlands, plants and animals that live there, and environmental threats.

An introduction to the geography, history, culture, and people of Canada.

An introduction to the geography, history, culture, and people of Japan.

An introduction to the geography, history, culture, and people of Mexico.