2) The seas(are filled) with poison: industrial and nuclear waste, chemical fertilisers and pesticides. 3) If nothing (is done) about it, one day no animal or plant will be able to live in the seas. 4) Tons of harmful substances(are emitted daily) by industrial enterprises. 5) As globalization continues and the earth’s natural processes transform local problems into international issues, few societies(will be left) untouched by major environmental problems. 6) Acid rain, one of the most important environmental problems of all, cannot(be seen). The invisible gases that cause acid rain usually come from automobiles or coal-burning power plants. 7) Air pollution can have serious consequences for the health of human beings; the natural ecosystem(is) severely affected by it.
2) The seas(are filled) with poison: industrial and nuclear waste, chemical fertilisers and pesticides. 3) If nothing (is done) about it, one day no animal or plant will be able to live in the seas. 4) Tons of harmful substances(are emitted daily) by industrial enterprises. 5) As globalization continues and the earth’s natural processes transform local problems into international issues, few societies(will be left) untouched by major environmental problems. 6) Acid rain, one of the most important environmental problems of all, cannot(be seen). The invisible gases that cause acid rain usually come from automobiles or coal-burning power plants. 7) Air pollution can have serious consequences for the health of human beings; the natural ecosystem(is) severely affected by it.
b) Suddenly she was hearing someone is calling her name