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Trees and vegetation have to be cleared first when establishing paddy fields. If the land is hilly, then the landscape is terraced (like a series of steps) as paddy fields have to be flooded with water. Each field is dug out and earth is used to build dykes around the edges.

Rice paddy fields are a substantial contributor of methane, a powerful greenhouse gas, as organic matter decomposes anaerobicly under the water.

So paddy fields do change the environment in several ways.

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