Here is a corrected version of your paragraph of writing: "Pollution is a problem that all countries struggle with. Industry has destroyed the environment, so much so, that we have put our planet in danger. Contributors to our planet's pollution are: cars; that emit toxic fumes, trash which builds up every day and needs a place for it to be kept separate from people and where they live; construction, which ruins the earth's ability to grow leaves, grass, and trees which benefit humans by emitting carbon dioxide. Humanity is responsible for pollution, and the one who will suffer the consequences. Diseases such as lung cancer and skin cancer affect everyone is a world with pollution and a reduced ozone layer. Even some animals and plants have been made extinct by the changes in the air caused by contamination. We must find solutions to our prior mistakes with Mother nature. If we take care of her, we will be taking care of us at the same time." Good luck :)

I'm going to offer a limited correction that focuses on grammar without changing too much of your sentences. Some of these sentences still might not be perfectly natural, but they're grammatically correct and very similar to what you wrote: * * * Pollution is a problem that all countries of the world suffer from. We destroyed the environment with our factories, and we have put our planet in danger. Some causes are: cars, which launch toxic fumes everywhere; trash, which has been thrown everywhere; and the construction of new cities, which reduces available land for agriculture. Man is the one who has caused this pollution and who will suffer the consequences. These consequences include diseases such as lung and skin cancers that can affect anyone, the disappearance of animals and plants that cause an imbalance in nature, as well as impure air and other consequences. We must correct our mistakes before pollution reaches even higher levels. We have to take care of the environment, and she'll take care of us.

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