在线等初二英语演讲稿```不要复制的``7点用

The Earth is humanity's common homeland, however, along with the science and technology development and the economical scale expansion, the global environment condition worsened continually in the past 30 years.Some materials indicated that,Has been angry likely the instrument observation record since 1860, the whole world yearly average temperature elevated 0.6 degree Celsius, the warmest 13 years appear after 1983.1980s, the whole world every year the population which is affected the disaster is equally 147,000,000, but arrived for 1990s, this numeral rises to 211,000,000.At present in the world approximately has 40% population to lack the water seriously, if this tendency cannot obtain the containment, in 30 years, the global 55% above population will face the water shortage.The natural environment worsening seriously is also threatening on Earth's wild species.Now the global 12% birds and 1/4 mammals border on exterminate, but fishes for excessively has caused 1/3 fish s