Kyoto had no verifiable effect on CO₂ emissions Likely Paris will have no discernible effect on CO₂ either http://www.sciencedirect.com/science/article/pii/S0095069616304296 …pic.twitter.com/oCW4vOvNn4
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Why aren't you buying that world wide political ambition will spark technological innovation - thus indirect effect?
It will – a little bit. But most money goes to existing, inefficient technology. If you want innovation, then actually spend it on green R&D