Автор работы: Пользователь скрыл имя, 01 Декабря 2012 в 23:01, доклад
There are many ecological problems nowadays and that is because the world becomes more and more civilized it is polluted more and more. At this rate of increasing pollution our planet may become inhospitable to live in. Humans have inhabited the planet Earth for millions of years. However, only in the past 1,000 years we caused terrible harm to Earth’s fragile ecosystem. Each generation finds new comfort in convenient packaging, easy-to-use spray cans, and cars that go faster