近十几年来，人们在新年互赠贺卡、表达问候与祝福渐渐成为一种习惯，于是辞旧迎新的钟声总是伴着满天飞的千万张贺卡来临。但今年岁末，却有些不同。１９９８年１１月１９日，在北京市环保基金会的倡导下，北京市１０所中小学联合发起“免赠贺卡，保护绿树”的绿色生活行... In the past decade and more, people have exchanged greeting cards and greetings in the New Year. Gradually, it has become a habit that the bells and whistles are always accompanied by millions of greeting cards flying in the sky. However, this year’s end of the year is somewhat different. On November 19, 1998, under the initiative of Beijing Environmental Protection Foundation, 10 primary and secondary schools in Beijing jointly launched the green life line of “Free greeting cards and green trees” ...