256719 I know a lot about environmental problems. CK 244575 We had a lecture on environmental pollution. CM 21013 Environmental problems call for quick action. CK 21022 Environmental changes gave rise to new species. CK 262946 We must pay attention to environmental problems. CK 680118 Tom works for the Environmental Protection Agency. Source_VOA 262873 We ought to be more interested in environmental issues. CM 954480 We should pay more attention to environmental problems. CK 270269 Man has a great capacity to adapt to environmental changes. CM 680295 They always give their attention to environmental problems. Source_VOA 21018 How to deal with environmental pollution is a serious matter. NekoKanjya 21016 Environmental pollution is causing abnormal weather conditions. CK 247227 Not a day goes by without our hearing of an environmental problem. CK 45146 Industrialization of the region must be carried out very carefully to avoid environmental destruction. CK