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wer station nearby? What problems does air pollution cause? (unpleasant smells, kill trees, etc.) Choose three of these problems. Plan a letter to the Bureau describing them and asking for their help in solving them. You can use the notes below to help you. A2 Work alone. Write the letter putting in the address and date, starting with Dear Sir/Madam and ending with Yours faithfully and your signature. B Discuss or research the following topics. Read the short definitions below and contribute any information you know. ? Acid rain is rain containing chemical