Compared to on-line shopping with two big differences….
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The global climate change industry is worth an annual $1.5 trillion, according to Climate Change Business Journal. That’s the equivalent of $4 billion a day spent on vital stuff like carbon trading, biofuels, and wind turbines. Or — as Jo Nova notes — it’s the same amount the world spends every year on online shopping.

But there’s a subtle difference between these two industries — the global warming one and the online shopping one. Can you guess what it is?