Asked by Amber
                Why do the United States and Canada cooperate on environmental problems?
Thank You sooooooo much for your help! I really appreciate it! :)
            
        Thank You sooooooo much for your help! I really appreciate it! :)
Answers
                    Answered by
            Ms. Sue
            
    Canada and the U.S. share the longest international border in the world -- 5,525 miles long.
    
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