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Lighting is pretty small potatoes compared to transportation and agriculture and climate control. Your efficiency improvements, while great, are vastly outweighed by increases in global population and standards of living.

If you were to wave a magic wand and put a complete stop to human CO2 emissions today, the consequences of climate change would still be felt for decades. Never mind some technological change in the next 30 years, we needed something in the last 30 years. It's too late to stop it now, the only question is how much it can be mitigated, and how to deal with the consequences.

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