"Apparently there are three levels of brain activity. Level 1 is the lowest level - the amount of concentration required to, say, delete emails or serve in congress."

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The different policies reduce damages by only a modest amount. Indeed, one of the surprises is how little the policies affect the damages from global warming. The reasons are that, because there is so much inertia in the climate system and because the Protocol reduced the global temperature increase by only a fraction of a degree over the next century.

— Henry Sylvester Jacoby