if we throw pesticides into the rivers, fish will die, if we use plastic bags, rivers will be polluted, if we do not reuse, we will pollute the oceans, If we throw garbage on the school, we will pollute the school, if we kill animals, they will get extinct, if we cut down trees, there will be deforestation, if we throw garbage into the rivers, rivers will be contaminated, if we use too many cars, air will be polluted, if we use electric cars, pollution will be reduce, if we plant trees, we will protect the rainforest, if we do not use the trash can, we will litter, if we use too much plastic bags, rivers and seas will be polluted, if we don't pick up the garbage, we will pollute the environment, if people fix their cars on time, we will have clean air

- if Conditional

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