The Worldwatch Institute says that deforestation(采伐森林) has been speeding over the last 30 years. But, Lomborg, researcher from New York University, says that is simply not true. Since the beginning of agriculture the world has lost about 20% of its forest cover, in recent decades the forest area's reducing has come to a stop. According to UN reports, the area of forests takes up about 30% of total land area , (remain)almost steady since 1940s. Forests in countries such as the US, UK and Canada have (actual) been increasing over the past 40 years. Despite all the warnings the Amazon rainforest has only decreased about 15%.
Nor are all our species (die)out. Some researchers say that 50% of all species will have died out within 50 years. But other studies show only 0.08% of species are dying out each year. Efforts have been made in the past years have been successful. Whales are no longer threatened and the bald eagle (秃鹰)is off the (endanger)list.
Environmental groups state that many of the (improve)are the results of their campaigns. Stephen Tindale, director of Greenpeace UK, said, " is a relief to see that things weren't as bad as predicted, and that's because our behavior changed."
