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But US emissions cuts look much more impressive if you count cuts in agricultural pollution, the contributions to preserving forests in developing nations and buying emissions allowances from poor countries.
BBC: Climate chief's pledge on energy
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Much more serious threats to many species of fungi are pollution, intensive agriculture and the disappearance of many of the fields, forests, meadows and verges where they used to flourish.
ECONOMIST: FUN WITH FUNGI
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According to Dr Corsi, disproportionate effort is wasted campaigning against certain forms of outdoor pollution, when there is as much or more cause for concern indoors, right under people's noses.
ECONOMIST: Indoor pollution
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Tailpipe emissions standards are a much more important issue in California, which has them in place to control pollution from millions of cars, than in North Dakota, which does not have regulations.
FORBES: Magazine Article