Автор работы: Пользователь скрыл имя, 20 Ноября 2010 в 13:14, реферат
We live on a very beautiful planet – on the Earth. Our planet has very rich resources: the bright blue of the sky, fresh, crystal-clear mountain lake water, the rich green of the mountains slopes, wild flower, picturesque views – all these sceneries of nature fill us with admiration.
That’s why those who live in cities prefer spending their days off and their holidays far from the noise of the city, to be closer to nature. Perhaps they like to breathe fresh air or to swim in clear water because the ecology is not so poor as in the cities.
Ecology is the study of the ways in which organisms (plants and animals) depend upon each other and upon their surroundings. Each organism requires conditions in order to be able to live and breed. These conditions are its environment by changing the ecological conditions
And there is no escape from this ecological crisis without organizing
a single body dealing with the environmental problems, developing and
carrying out a nationwide program of environmental protection and co-operating
with international schemes.
Conclusion.
Scientists now predict that by the year 2050 the population will be doubled what is today. The fact remains that the rate of food production fell behind population growth in many of developing countries. The annual fish catch already exceeds what the world ‘s oceans can successfully sustain. If we go on using our natural recourses at today’s rates, we will have used up the intire reserves of cooper, natural gas and oil by the year 2054.
But the problem ahead lie not so much in what we use but in what we
waste. What faces us is not so much a recourse crisis as a pollution
crisis. The only solution is to try to change the areas of consumption,
technology and population. Changes in technology must be baked by slower
population growth. And it can be achieved by education in health and
women’s rights. And there is a little hope of reducing consumption
over the next half century.