Week 4: Task 1 - Saved by the Sun

http://video.pbs.org/video/980039287/program/979359664/topic/979380997

I listen this video for 20 minutes.

Summary:
Global warming is more and more serious nowadays. We have to develop the clean energy. The solar power is a good one. The gas crisis happened in 1970 so that the solar power had been invented. The solar power is more expensive than fossil energy. There is a man who works in "National Renewable Energy Laboratory". He develop the solar power, moreover he knew the history of it. He had the first solar video. Solar panel has three parts. The top part is protecting. The middle part is the solar energy. The third part is base. Bill has two solar houses. He said that one half of the roof is dedicated to generating hot water, the other half is our electric power plant. On the other hand, they can save electricity and sent the surplus to other's home automatically. The roof has been "solarized." When you start from scratch, the architect can meld the various functions into the overall design. There are no shingles--actually, it's shingled in glass which covers the solar thermal panels and is part of the photovoltaic panels.

Opinion:I am interested in environment issue. We have the only earth. The solar power is an important technology. The hurricane attacked our place seriously. The sea level arises. He can we face those preambles and save them? After watching this video. I realized that the solar power is a good technology to reduce the CO2. Although there is little people use this, it is still a tendency in the future. I respect those sciences who worked hard in this field. Bill has a website which introduce the solar power.

vocabulary:
consumption- the amount of energy, oil, electricity etc that is used
invest-to buy shares, property, or goods because you hope that the value will increase and you can make a profit
assume-to think that something is true, although you do not have definite proof