martes, 31 de agosto de 2010

Questions greenhouse

1.- Waht the most commun greenhouse gas emmited from human activities?
it's carbon dioxide
2.- Do you think greenouse gases in the atmpsphere are always bad for human and the enviorement?
No, because the gases help to keep the normal temperature in the planet
3.- In the which of the following ways do people increase the concentration of the greenhouse gases in the atmosphere and why?
a) cuttin down trees   b) drving gasoline - powered automobiles
c) burning coat to create electricity   d) all of above
- because tha carbon dioxide is produced in great  quantity anditisn't absorbed by trees 
4.- Why greenhouse gases cause global warming and explain it?
a) absorbing and reradia ting heat from infrared rays b) causing the atmosphera to catch fire
c) absorbing the water in the atmosphera d) reflecting solar rays
- because this gases don't let to thw solar rays go aut from the planet

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