【正文】 se and cooking fires made it like a scene from hell! i admit, frightening.to the nature, overpopulation is a big problem. more people, more pollution. and the big population is threatening the nature every second.the rapid rise in world population is not creating problems only for the developing countries. the whole world faces the problem that raw materials are being used up at an increasing rate and food production can not keep up with the population increase. people in rich countries make the heaviest demands on the world39。t throw any litter onto the ground and we should collect them forrecycling.if we take good care of our earth today,it will be more beautiful tomorrow關(guān)于環(huán)保的英語演講4what is nature? it39。 harmful waste.now, we are going to talk about each sort of waste one by one.material waste: it means the waste of substance or things from which something else can be made.for example, people throw away the used metal products and buy a new one, so the old metal waste accumulates.at last, they bee waste.for example, when people finish reading newspaper, the paper will bee waste.when the glass is broken, it also bees waste.nobody wants to use a broken window or drink with a broken glass or wear a pair of broken glasses.once it is broken, it bees waste.the rate of using plastics is increasing day by day.people use plastic bags because they are convenient.when they get home, they throw the plastics way, paying no attention to the environment.the more convenience plastics brings to us, the more plastic waste is produced.this is called “white pollution” as most plastics are white.some of our products we use every day are made of rubber, just like the tyres and the bottom part of our shoes.it’s true that rubber plays an important role in our life.however, it also brings us some trouble when it has been used for a long time and bees old.the old tyres bee waste because it can’t break down by nature.this is really a big problem.關(guān)于環(huán)保的英語演講三分鐘相關(guān)：