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nicolas gruyer
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Our last (free) Market Game, introducing CO2 taxes, quotas or reduction subsidies: http://economics-games.com/carbon-market-game

(on g+, check our main page here : https://plus.google.com/u/0/b/109297537016273025849/111687138740856767949)
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Can you Draw 4 straight lines through 9 dots without taking your pen off the paper? (https://www.bbvaopenmind.com/en/martin-gardner-and-math-fun)
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