You must have heard of an energy crisis. This crisis refers to the rate of depletion of non-renewable resources of energy. Non-renewable energy resources cannot reproduce on their own and they take a lot of time to get replenished. The rate of depletion of these resources is greater than the rate of their replenishment. As a result, a time will come in future when inhabitants of the earth will have no non-renewable energy resource to back up their day-to-day energy needs.
from Health and Fitness:Environmental Issues Articles from EzineArticles.com http://ift.tt/1s9TOYM