On Aprial 22nd,more than 190 counties,including the United States,celebrated Earth Day.

    It is a day to reflect on the impact humans have on the earth,and to  demonstrate and reaffirm our support for environmental protection.

    The first Earth Day was planned as a Teach-in,a day to inform about environmental issues.Earth Day's founder,United States Senator Gaylord Nelson,an environment activist who was outraged by the lack of political response to gross environmental degradation throughout the country,said that he was"convinced that all we need to do bring an overwhelming insistence of the new generation that we stem the tide of environment disaster is to present the facts clearly and dramatically.Every university should set aside one day in the school year the same day across the Nation-for the teach-in.

    His plan worked:over 20 million people turned up for Senator Nelson's first Earth Day Teach-on April 22,1970.And from then on,the movement grew spontaneously,creating its own momentum with no central organization.Today,we continue the traditions of that first Earth Day.

    Because education is the foundation of progress,this year's theme is Environmental and Climate Literacy.Citizens who understand well the importance of these issues,and the impact they have on our lives,can make small changes to minimize their impact on the environment and influence environmental practices within their communities even influence environment policy.