| http://www.w3.org/ns/prov#value | - ( may nghien rac) ??? ??? ??? erosion su xoi mon ??? ??? ??? exhaust fume khoi thai ??? ??? ??? fertilizer phan bon ??? ??? ??? food chain ... ??? ??? ??? greenhouse gases ... ??? ??? ??? pollutant a substance that pollutes something, especially air and water( chay gay o nhiem) ??? ??? ??? chronic lasting for a long time; difficult to cure or get rid of( man tinh, kinh nien) ??? ??? ??? conceivabl
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