1、 lAir pollutionlWater pollutionlPast and todaylThe pollutions effect on uslWhat should we do1.nature problem.2.peoples duty.Air pollution is at its worst over big cities where millions of people live,work,and travel about in cars,buses,and trucks.Factory chimneys can be fitted with devices to cut do
2、wn air pollution,but this is expensive.If better pubic transport and cycle lanes were available in towns and cities,people would be less likely to use their cars,reducing the overall amount of pollution.Smoking cigarettes adds to the general levels of air pollution as well as damaging our health.Cig
3、arette smoke contains chemicals that can cause cancer,a gas which stops oxygen being taken into the blood and a substance called nicotine,which raises blood pressure and makes the heart beat faster.No-smoking areas cut down on this pollution and save non-smokers breathing in other peoples cigarette
4、smoke.1.Air pollution index.(API)2.Particulate matter(PM2.5)Air pollution index is a group of numbers which show how serious the air pollution is.A kind of statistics about the diameter of matters we can breathe in.1.carbon dioxide(CO2)2.carbon monoxide(CO)3.suldur dioxide(SO2)4.Kyoto Protocol!Kyoto
5、 Protocol!The Kyoto Protocol was an agreement negotiated by many countries in December 1997 and came into force with Russias ratification on February 16,2005.The reason for the lengthy time span between the terms of agreement being settled upon and the protocol being engaged was due to terms of Kyot
6、o requiring at least 55 parties to ratify the agreement and for the total of those parties emissions to be at least 55%of global production of greenhouse gases.The Kyoto Protocol,while well intentioned,would appear to be doomed to failing its objectives even before the 2008-2012 averaging period com
7、mences.Carbon dioxide levels in the atmosphere are rising at a frightening rate with no sign of slowing.Global temperatures are continuing to rise.The science behind Kyoto was shaky due to the limited availability of crucial data and knowledge at the time;particularly in regard to positive feedback
8、loops in nature being revealed that amplify warming and prevent carbon dioxide from being absorbed.Scientists studying global warming are finding Nature fighting back in ways they never contemplated daily.Kyoto should be viewed as a stepping stone to more drastic action.And that action is required n
9、ow.Water protectionWe all know that water is very important in our life.All kinds of beautiful waterWater scarcity and pollution has become one of the most important things in recent years.In this chapter well discuss both fresh water and wastewater treatment,either for reuse or disposal in the envi
10、ronment without polluting it.DroughtPollutionN O WApproximately 300 million nationwide have no access to clean water.Furthermore,over 700 million Chinese drink fetid water below World Health Organization standards.Almost 90%of underground water in cities are affected by pollution and 80%of Chinas ri
11、vers fail to meet standards for fishing.Almost all of the nations rivers are considered polluted to some degree,and half of the population lacks access to clean drinking water.Ninety percent of urban water bodies are severely polluted.Water pollutionmanage water pollution Save water in every day lif
12、eWhat should we do?It is a problem,butIt is time to do!Take action now!Take action now!Long long ago,our mother earth is a amazing planet with deep blue water and sky.There are kinds of wild animals which had a happy life at the sake of god.Its not what we say,but what we do THAT really counts .Envi
13、ronmental problems are becoming more and more serious all over the world.For example,cars have made the air unhealthy for people to breathe and poisonous gas is given off by factories.Trees on the hills have been cut down and waste water is being poured continuously into rivers.Furthermore,wherever
14、we go today,we can find rubbish carelessly disposed.Pollution is,in fact,threatening our existence.The earth is our home and we have the duty to take care of it for ourselves and for our later generations.Fortunately,more and more people have realized these problems.Measures have been taken to cope
15、with these problems by the government.Laws have been passed to stop pollution.I hope the problem will be solved in the near future and our home will become better and betterEnvironmental problems are becoming more and more serious all over the world.For example,cars have made the air unhealthy for p
16、eople to breathe and poisonous gas is given off by factories.Trees on the hills have been cut down and waste water is being poured continuously into rivers.Furthermore,wherever we go today,we can find rubbish carelessly disposed.Pollution is,in fact,threatening our existence.The earth is our home an
17、d we have the duty to take care of it for ourselves and for our later generations.Fortunately,more and more people have realized these problems.Measures have been taken to cope with these problems by the government.Laws have been passed to stop pollution.I hope the problem will be solved in the near
18、 future and our home will become better and better死亡原因恶性肿瘤脑血管病心脏病呼吸系统疾病损伤及中毒内分泌营养和代谢疾病消化系统疾病泌尿生殖系统疾病神经系统疾病精神障碍比例27.63%21.33%20.43%10.10%5.11%3.55%2.67%1.88%1.14%1.12%To deal with water pollution:the governments of all countries are supposed to formulate rules and regulations to deal with the polluti
19、on problem.Polluted water must be purified before it was discharged.Try our best to save water,We do can make differences.Tips to save waterWhen brushing your teeth or taking a shower,only let the water run during the rinse stage:turn off the water when brushing your teeth and shampooing.-Instead of
20、 buying water bottles,buy a re-usable water bottle and fill it with tap water.Cut your shower time by 1 minute.It might not seem like much,a little goes a long way,which can save you up to 150 gallons of water a month.Plant trees,They clean the air and bring us enough oxygen.They help keep the balance of nature.Take bus instead of by taxi or car if you are not urgent.
