Carbon Taxing?

In this TED Talk, Al Gore argues for global action to face global crisis. The proposed solution: tax carbon. In theory, it sounds like a good option. However, how to bring it to reality? How many changes in economies would this produce? Certainly, companies would be tempted to use renewable energy sources, and these would become a great market. However, oil companies hold much of the power behind curtains. Could a social movement achieve this change? Could this be effectively implemented in most countries? What to do with countries who would not tax their carbon emissions? This huge change wouldn't be the end of the world, certainly, but such a drastic transformation seems almost impossible. Well, let's fight for this almost impossibility, otherwise we'll be sitting on our fat behinds waiting for catastrophes to force the transformation.

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