missing words exercise

Try to find out the following missing words, many of them are related to ways to save energy...I´ve already done it and it´s very interesting not only to revise the previous one but also to learn new expressions... come on, do it and try your luck at it!!!!!!!!!!!!!!!!!! best wishes, your teacher!!!http://www.learn-english-today.com/environment/env-missing_words/mw_preserve-planet.html