the earth, plants, animals, people, forests, rivers, sky, seas,oceans, mountains, birds, pests, beasts, people, farmers, cities, towns, countries, islands, water, crops, flowers, environment, pollute, pollution, destroy, provent / stop...from...; protect ...from/against...; protection, forest fires, air pollution, environtmental pollition, food pollution, lakes, be the home of...; be in danger; be dangerous to...; be harmful to health; suffer from...; take actions; take steps to do...; have only one earth; become more and mor serious; be polluted by...; be against...; help...with...;
governments; factories, countryside, urban, rural 等等
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