Автор работы: Пользователь скрыл имя, 25 Августа 2013 в 18:13, сочинение
In today’s world, the more the rate of technological progress advances, the greater the need for renewable, efficient and reliable energy resource becomes. Unfortunately, most of the common resources we use nowadays such as oil and coal are no longer dependable. Oil, for example, is an extremely limited supply of non-renewable energy resource, which takes millions of years to form and once depleted can no longer be used again. Coal which is another type of renewable energy emits a great amount of harmful waste such as carbon dioxide and acids that in turn lead to global warming.