a talk delivered by environmental scientist David Keith: a cheap, effective, shocking solution to climate change: What if we injected a huge cloud of ash into the atmosphere, to deflect sunlight and heat?
people have been discussing about climate change since 1950, but the situation has not been better. what is the reason?
maybe, it's time to think wilder. how about imitate the nature - eruption of volcanos
help cool the atmosphere. it's terribly cheap! but the hiden problem is that when people know it's easy to solve the problem then there is less incentive for people to reduce their harmful activities such as emission of CO2. that is also called moral hazard. so, a DEBATE is really in need.
help cool the atmosphere. it's terribly cheap! but the hiden problem is that when people know it's easy to solve the problem then there is less incentive for people to reduce their harmful activities such as emission of CO2. that is also called moral hazard. so, a DEBATE is really in need.the speed of the speaker is quite quick. if you have time, take a look~ or go to TED and check out more speeches on Climate Change.
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