Greenhouse gas emissions of tar sands crude are 40 % higher than conventional oil , and the open-pit mining has devastated alberta 's boreal forest .
焦油砂的温室气体排放量比普通石油高40%，露天采矿已经极大地破坏了阿尔伯塔的北方气候带森林。
For a party closely tied to the oil industry , the conservatives-who won a majority on may 2nd after five years of minority government-have been surprisingly progressive in protecting boreal land .
Microscopic animals that live in soils are as diverse in the tropical forests of costa rica as they are in the arid grasslands of kenya , or the tundra and boreal forests of alaska and sweden .
There are also some ecosystems , such as the boreal forests of canada and siberia and the amazon rainforest , which are huge absorbers of carbon dioxide , but which are changing rapidly because of temperature increases and deforestation .
Soil samples were taken from 11 sites around the world , including tropical forest in costa rica , arid grassland in kenya , warm temperate forest in new zealand , shrub steppe of argentina and tundra and boreal forest of alaska and sweden .
