http://www.articleheaven.net en-us editorial@articlealley.com Recently many terrifying disasters happened in the world: strong earthquakes hit Haiti, Chile, China, etc. one after another. Some may say it is normal for the movement of Earth's crust, while how to explain the extreme weathers, whether serious draughts ... http://www.articleheaven.net/efficient-feedback-to-earth-day-publicity-quiz-saves-you-out-of-environmental-disasters-1515768.html 23rd April 2010