dcdcyswg
春芽
共回答了12个问题采纳率:100% 举报
In the past time on the Earth,people destroy the vegetation,cut down all the trees,dig for the coal and mine,all for the use of human needs,like firewood,oil and gas.This movement has seriously brought big destructions to the ecological environment; if there's no trees on earth,flood will occur frequently; if we burn the coal and fire the woods,air will be polluted and people will breath in Co2 badly!fortunately,our community has take advantages on the new technologies.nowadays,we use marsh gas so all the vegetation are growing well; every family use natural as electricity,the air has purified!
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1年前
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