Read the text below and complete the gaps.Use only one word in each gap
Hope for a greener future
Enviromental activists have welcomed scientific research which may soon make it possible to use windows as source of solar (1)________.This will involve applying a see-through chemical liquid (2)___________ the surface of glass to capture light from the sun's rays. (3)____________ scientists can actually succeed in developing this technique,it will indeed be a major breakthrough, which will (4)____________ a huge difference in our life. A similar techinique was developed in the 1970s (5)____________ it was abandoned as it didn't prove to be very efficient. A team of researchers from the Massachusetts Institute of Technology(MIT) who specialise (6)___________ developing renewable sources of energy did a lot of research into what (7)____________ wrong and has made important change to the technology since then.As a result,scientist ar now confident that much more green energy wil be avaiable for everyday use.It seem that the Earth cannot be saves (8)_______ a lot more money is spent on similar schemes around the world.