Many upland watersheds are being deforested and degraded, and fresh water is becoming increasingly scarce. The exploitation of forests demanded displacement as areas were deforested. These environments include sphagnum bogs and partially deforested areas. As of 2008 1.3 billion hectares of tropical regions were deforested every year. In 2005, an estimated 56,000 hectares were deforested in Canada. This is attributed to the greatly deforested watersheds. Freetown's topography alternates between thickly wooded and partially deforested mountains. Europe has deforested the majority of its historical forests. It prevents soil erosion encountered in deforested areas. Ninety-one percent of all rainforest land deforested since 1970 is now used for livestock. But the catchment area is now severely deforested. Around 1800, large swathes of the Harz were deforested. China has deforested most of its historically wooded areas. The march of soybeans into deforested areas of the Amazon rain forest would come later. In the 20th century, several mountain crests were deforested because of their climatically exposed location.