很简单的，写这类作文，注意层次分段就行先介绍当今社会存在的环境问题，再以土壤污染为例，指出危害，最后，倡议人类要保护环境。The environment is everything around us，for example，air，water，animals，plants，buildings and so They all affect us in many ways and closely related to our People can't live without the ……Fortunately，it isn't too late to correct our People are coming to realiza the importance of the We have begun to try our best to improve Laws are being made dealing with air， water and noise The river be bright，the sky will be clear，the flowers will be beautiful，and the sunbeam will be dazzling and We believe that we wil be able to save our environment and live in a better world ……环境围绕我们身边，例如：空气、水、动物、建筑等。它们从各个方面影响着我们的生活，与我们的生活密切相关，人们离开环境就无法生存。幸运的是，现在改正错误还不晚。人们意识到环境的重要性。我们已经开始尽力改善环境。法律也开始涉及到空气、水和噪音等问题。将来，河流会更清澈，天空会更晴朗，花朵会更鲜艳，阳光会更灿烂、更温暖。保护环境会使我们生活在一个更加美好的世界中。And the use of plastic bags and disposable meal boxes should be What’s more，……at the same time people polluting our environment with dangerous chemicalstip:soil contamination
Soil grain grade composition of soil physical and chemical properties of influence， this is the method of using BiChongJi southwest area into several rock soil (purple soil， lime soil， volcanic dust) grain Some conclusions:Southwest area into rock (soil， lime， purple soil and volcanic dust particles in the sand， which accounts for more than viscous grain powder， small 2 the same soil layer， due to the different leaching deposition etc， on the effect of soil layer of grain composition class there are differences of sand soil， black limestone and clay content with the increase of depth and And the sand and volcanic ashes viscous grain content decreased with 3 the soil due to different locations eluviation weathering， the influence of human activity and the degree of different level， the soil grain composition there is some 4 different soil layer， due to the different soil of rock， soil contains sand development of sandstone and mudstone limestone， development of viscous grain 5 the same soil types， different sub-types of soil particle composition is different， but the trend is Keywords: rock into the soil， The soil profile， Grain grade， Determination
