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I have found it very useful to use simple concrete examples in discussions. The important thing is to make any concept graspable.

For instance one I have used about paper is that if we accept the fact that Europeans use on average around 300 kilos of paper fibre a year per capita, and in China the figure is 9 kilos, then if the per capita consumption in China was to rise to European levels, it would require 140.000 new paper mills to supply that increased demand. If people know the size of a paper mill, they then realize the size of the problem.

The biggest disconnect I have found is that people fail to understand big numbers. And not only that, but they fail to understand that individual actions which do not appear to them to be a problem, when multiplied a million times, become a huge problem.

For them, for instance, buying a plasma TV is a matter of choice: "I can afford it" even if it uses 6 times more electricity. And indeed one plasma TV has no effect on national electricity consumption. But when a million people buy a plasma TV, it needs a dedicated nuclear reactor.

You can't be me, I'm taken

by Sven Triloqvist on Thu Apr 23rd, 2009 at 02:24:39 PM EST
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Sven Triloqvist:
The biggest disconnect I have found is that people fail to understand big numbers. And not only that, but they fail to understand that individual actions which do not appear to them to be a problem, when multiplied a million times, become a huge problem.
That is easily the biggest failure of mathematical education, along with the inability to conduct simple statistical reasoning.

Most economists teach a theoretical framework that has been shown to be fundamentally useless. -- James K. Galbraith
by Migeru (migeru at eurotrib dot com) on Fri Apr 24th, 2009 at 04:13:35 AM EST
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