post1: What is green power?

1.  What is green power?

 

1.      three indispensable features of power

a.      can be provided constantly

b.     be harmless to the environment

 

c.      cheap

     green power is a kind of power which features environmentally-friendly

 

2.      Green powers are natural energetic processes that can be harnessed with little pollution. Besides, most of these energetic processes come from sun.

                     (picture 1)

 

you will know how sun provides these natural energetic processes with energy in following topics!!

 

 

 

3.      economic benefits: the major problem of green power

 

 In the table below, we can easily find out that green energy is much more expensive compared to Fossil-fuel power station. Even though everybody know green energy is harmless to the enviornment, when it comes to the costs of green energy, few people are willing to invest their money in it.

 

                  (picture 2)

 

2. Why green energy is so important ?

 

      Nowadays, we can hear lots of people talking about green energy and some developed countries are trying to develop green energy. It seems that green energy is getting more and more essential. I think there are two reasons that can explain this phenomenon.

                   

 

     One reason is related to the environment, and the other one comes from power. First of all, since Industrial Evolution, the emission of carbon dioxide has accummulated to an incredible amount. Some climate scientists pointed out we human being might be responsible for the climate changes associated with gloabal warming. One of the most horrible things caused by global warming is the rise of sea level. Around 23% of the worlds’ population lives in the near coastal zone with population densities about three times higher than the global average. The most recent IPCC assessment based on the most gloomy scenario puts predictions of 21st century sea level rise at between 26 and 59cm (10-23 inches). (#1)  Obviously, if we keep using fossil fuel instead of green energy, our lives will be threatened. Here is a vedio about the simulation of some place in the U.S. when sea level rises.

 video 1

 

 

The other reason is related to energy. Actually, all forms of energy on earth come from sun. In other words, as long as sun keeps burning, we won't run out of energy. Unfortunately, the main fuel we use, fossil fuel, need thousands of years(or even longer) to store energy of sun. Shortly after, we will  exhaust all fossil fuel, and it will absolutely be a crisis. Thus, finding ways to take advantages of renewable energy or green energy is a big task for us. Let this video remind us that we must develop green energy as fast as we can.

     video 2

 

 

 

Reference

 

picture 2 :  用再生能源打造非核家園    瑞昇文化  p13

#1 : http://www.greenpeace.org/international/en/campaigns/climate-change/impacts/sea_level_rise/

video 1 : https://www.youtube.com/watch?v=N13oAcUITAM
video 2 : https://www.youtube.com/watch?v=dI4-t7ujgyg