Green Energy, Black Numbers
Now, I love numbers. Numbers strengthen an argument, every language understands numbers, and very often only numbers can be decyfered from layer upon layer of bullshit. I was super excited to receive this book from fellow TEDster Bill Gates in the mail a few weeks ago, I tore through it in a matter of days, drinking up every last detail. Even if Green Tech doesn't wet your whistle, I'm sure you can see the benefit in at least reading the witty repartee from Cambridge professor turned political energy adviser, David MacKay. Below are some takeaways, which I have provided because I think they are the most important points made in David's book "Sustainable Energy - without the hot air", because the numbers make sense, because "green tech" is my thing, and because whether we are true believers in sustainability or not, everyone agrees - as a species, our electricity demands will grow exponentially over time. If you don't believe me - do the math. The good news is, the numbers over time are black, not red.Takeaways from "Sustainable Energy - without the hot air" 1. Wind, Solar, and Biomass are extremely exciting, but may not be politically realistic due to land restrictions.
Resolution: Import solar power from sunny countries2. If you make a small change, you'll see a small change.
Resolution: Gadgets only contribute 5% to our daily consumption, cars and buildings make a bigger difference.3. There's only so much lithium to go around - so pick - nuclear fission or batteries!
Resolution: Let's make better batteries first and ramp up solar and wind as we continue to better the technology. 4. There are many options to integrate renewables, we just have to pick one and stick with it!
Resolution: All else being equal if the only thing that matters is the bottom line: Nuclear wins. On a level economic playing field with a strong price signal preventing the emission of CO2, we don’t get a diverse solution, we get an economically optimal solution that delivers the required power at the lowest cost. And when ‘clean coal’ and nuclear go head to head on price, it’s nuclear that wins. (The capital cost of regular dirty coal power stations is $2 billion per GW, about the same as nuclear; but the capital cost of clean coal power, including carbon capture and storage, is roughly $4 billion per GW.) Offshore wind also loses to nuclear, but I’ve assumed that onshore wind costs about the same.






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