And while he does keep a bookkeeper on staff, unfortunately she's not around to answer questions at 4 a.m.

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The answer is, it would add at most 4% to the cost of building an iPhone.

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The answer (regardless of price fluctuations): 18.4 cents on every gallon that you purchase.

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Additionally, Chevrolet will have a team of Volt advisors available to answer questions starting today at 1-888-VOLT-4-YOU (1-888-865-8496).

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By the way if you're listening Microsoft, the Engadget answer to the above question is, oh, say 3 or 4.

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And the answer was clear: share price increased with an average of 1.4% by the hiring of such an advisory firm.

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The answer they calculate is that it will require a cut in carbon intensity by 4.8% per year between now and 2050.

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