In a situation where many national leaders do the same thing and look out for national interests, and with an issue like global warming, you're likely to get no solution, so I think you have to have some kind of ethical trump on some of those issues.
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Attempts to defend amusement parks and circuses on the grounds that they 'educate' people about animals should not be taken seriously. Such enterprises are part of the commercial entertainment industry. The most important lesson they teach impressionable young minds is that it is acceptable to keep animals in captivity for human amusement.