But, realizing that local temperatures everywhere are so very variable and much more extreme than the global changes that they were saying would devastate the planet, it would be hard to convince anyone long term that the planet was continually getting warmer.

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But unlike Global Insight, they use a proxy for the first variable that is not itself affected by the second.

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The companies listed in the Metals Channel Global Mining Titans Index are not fixed, but instead variable updating on a continuous basis to reflect the changing market environment with respect to commodity prices, government policy and market volatility.

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They know it, so attempts at major legislation have tended to crowd in the first two years hence stock returns on average have been more variable then. (For US stocks, but the pattern largely holds for global stocks.) There have been plenty of big double-digit positive years in years one and two, but the variability drags down the averages to 8% and 9% respectively.

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