Complete the sentence with people must or people must not and

Complete the sentence with people must or people must not and write them down
1)...keep their planet clean
2)...protect endangered species of plants and animals
3)...dump waste into seas,lakes and rivers
4)...cut down a lot of trees
5)...destroy the animals' natural habitats
6)...pollute the environment
7)...teach their children to love nature
8)...think about the future of the planet
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