with the development of economy,people's living standard has improved a lot .but some environmental problems has exposed,thishas lead to many natural disasters such as forestfire ??air pollution and soon??it is necessary for us to take some measures to prevent it??first is to protect environment ??save electricity and water??after all the natural resources are limited .meanwhile??we need to stop deforest ??actually we all know what should do and not.it's urgent for us to act now to protect our common home ????? ???????????????????лл??????????????????????????????????????????????????????????????????