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    why are tops of buildings often green

    0  Views: 780 Answers: 3 Posted: 12 years ago
    Tags: buildings

    3 Answers

    Copper sheeting on a roof will oxidize ... the green colour is referred to as patina.

    The colour denotes a roof made of copper sheeting usually

    I have no idea but, Obama is probably giving the building owners some of  YOUR tax money to go "Green," by growing vegetation to absorb rainwater and provide insulation and creating a habitat for wildlife, all to  help to lower urban air temperatures and mitigate the heat island effect in an effort to save the planet, WBMG


     


     


     

    Ann

    Very funny.


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