00881nam a2200217Ia 4500 CTU_123183 210402s9999 xx 000 0 und d .95 363.7 T374 The Earth Works Group 50 simple things you can do to save the earth The Earth Works Group Berkeley, CA Earthworks Press 1989 The book introduces environment issues such as greenhouse effect, nitrogen oxide, ultraviolet as well as warns of endangerous in groundwater, acid rain, landfills. The book offers more than 50 suggestions for concerned people who want to take an active role in saving the planet Environmental protection Citizen participation Hiếu, Huỳnh Mai Trung tâm Học liệu Trường Đại học Cần Thơ