The forests also supply the planet with an enormous supply of oxygen. Even so, from 2000 to 2010, for example, about 93,000 square miles (240,000 square kilometers) of the Amazon rainforest were razed, covering an area roughly the size of the United Kingdom.
3. Protect areas with high biodiversity Not all areas are created equal. Certain places should be left alone, such as those that are home to endangered species, species found nowhere else, particularly high varieties of species and those that provide other important ecological benefits.
Examples of areas that need your special attention include Madagascar, which is like no other place in the world - it is the only spot where lemurs and many other unique life-forms dwell. But forest and grassland habitat on this island off the coast of Africa is being destroyed rapidly; Madagascar has lost at least 90 percent of its original forest cover.
Another jewel would be the Philippines, which has one of the highest levels of biodiversity on the planet, but is threatened by deforestation and development. A single recent expedition found more than 300 species that are likely new to science, including a deep-sea shark that can inflate itself when frightened. But these species are potentially in danger from human activities, while other species could go extinct there and in other spots before they are even discovered.