Как выбрать гостиницу для кошек
14 декабря, 2021
Сегодня каждый, кто собирается в отпуск и не знает, с кем оставить своего котика или кошку, может во[...]
Hydroelectric power
Hydroelectric power is a clean, non-polluting, long-lasting, renewable source, which does not produce carbon dioxide. Large-scale hydroelectric plants are responsible for about 17% of the electricity supply in developed countries and 31% in developing countries. However, hydroelectric systems have environmental impacts and can only be sited in certain areas, restricting their application.