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The greenhouse effect is vital in maintaining liveable temperatures on earth, its the increase that humans are causing that is the bad part.
...just in case you were wondering (also i have an exam on environmental stuff like this tomorrow, so in a way im doing a bit of studying here and legitmizing my procrastin
methane=fartsfarts .:. damage ozone layer. gosh! i thought everyone knew that...
It`s called intensive farming. You think there`d be this many cows alive if humans didn`t exist?