Wednesday, February 20, 2013

READING RELATED ESSAY: SUCKING CO2 FROM THE AIR WITH ARTIFICIAL TREES


                       
   One of the serious problems of the world is global warming.This problem is changing the climate, melting the glaciers, warming the habitats for plants and animals.If it is not resolved, many more serious problems may emerge such as the lack of water around the world and a great increase in epidemics.People have noticed this and started to plant more trees.However, planting trees is an insufficient method since growing a tree takes too much time.There is a logical method discovered by Lackner.He has designed an artificial tree which passively soaks up carbondioxide from the air.
   Firstly, fake plastic trees, which were designed by Lackner, have advantages.For instance, they don’t need to be exposed to sunlight to work so the leaves can be much more closely spaced and overlapped.Also leaves can soak up carbondioxide during the day and it is twice as efficient as a normal tree. In addition, the leaves store CO2 as a bicarbonate on the leaf so removing the CO2 is easy by rinsing the leaves and drying them naturally in the wind.
   Secondly, ten million of these trees would remove 3.6 billion tonnes of carbondioxide per year; in other words, approximately 10 percent of our global yearly carbondioxide emission.Therefore, our total emission can be removed with 100 million trees.However, we may need 1,000 times more of the real trees so as to have the same impact.
    Lackner says his trees can do the job for $200 per tonne of removed carbondioxide.Nonetheless, it is very optimistic.According to American Physical Society’s calculations, it is $600 per tonne at least.Because of these prices, this way may not be economical.
   In conclusion, global warming is continuing to threaten life around the world so an urgent solution should be found.The idea of fake trees has many advantages inspite of the cost. Despite the expense, we should use this way since we haven’t got another idea that is more logical and safer.
                                                            ALİ KİREÇLİGÖL
                                                            Pre-int 2013  

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