Hi there Aver:   

  Let's look at your essay.

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My dream: I want to have a garden.

Nowadays, foods are contaminated with pesticide.

Therefore,  we need to notice our foods carefully. This fact causes me to want to have a garden. By having a garden, I can plant  organic vegetables and fruits, (without pesticide) by myself. So I know what I eat, and I can take care my health. Beside that, when we pick the ripened fruits and take the fresh vegetables from  our own garden, we can feel satisfied and we can enjoy the harvest time.

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   A very nice composition.    It is an essay that can appeal to all.

.--Bruce