The letter is illustrated below based on the information given.
Dear Mr. John
It's an honor to write you this letter. I'm amazed by the work that you've been doing and it's appreciated.
I'm writing this letter to tell you that I'll like to organize a rally to make people aware of the issue of pollution.
The river here is polluted by locals and it will be an opportunity to enlighten them. I need you support to achieving this.
Yours faithfully,
Singh.
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