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Shaun's avatar

I don't think you're being fair to Kennedy. I don't think any of his stupidity is to curry favour. His stupidity is simple stupidity. He is a true believer.

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Deiseach's avatar

The energy tweet may be dumb, but it's a little less dumb than you think regarding energy needs.

"The obvious example is cars: Electric cars become more viable if you run them on abundant and cheap solar power. Same with industrial processes; most people don’t think about industrial processes much because most of us don’t run an aluminum casting plant, but 23 percent of US greenhouse gas emissions come from industrial processes, and much of that could be electrified."

Sure, but the problem currently is (1) renewables like solar and wind are not continuous. When the sun isn't shining or the wind isn't blowing, you are not generating electricity. That's why we're still reliant on conventional power plants to take up the slack for energy needs.

(2) Storage is the problem. Batteries currently aren't light enough and long-term enough to enable travel (such as the electric cars) over long distances. So, for instance, having electric trucks and lorries hauling goods across the continent? Not workable yet. Filling a vehicle with a tank of gas means you get immediate fuel access. Having to stop and plug in your vehicle to a charger- if you can find one - for several hours makes it less convenient than "urban car user who only makes short trips and can charge their vehicle overnight at home or while they're at work". Things like trams and trains work because they are in contact with external electricity supply (such as overhead wires or third rails). We don't have the likes on roads yet. All this is being worked on, but right now, our transport needs aren't going to be filled by electric vehicles.

(3) Hard to access places. Fine, you live in a city or the suburbs which are serviced by those vehicle charging ports. What about if you live several miles outside the city, or up a mountain, or in other locations where there isn't a convenient and reliable charging source?

(4) Manufacturing is a good example, it's a lot easier to convert a plant into running on renewable energy when you can set up your own solar panels farm or wind turbine. But again, currently very heavy demand users may not work so well:

https://www.reuters.com/plus/how-manufacturers-can-transition-to-100-renewable-electricity

"“Organisations with lighter electricity needs and stable finances will be best positioned to transition to renewables. Companies with high electricity demand, like furnaces for glass, smelting or other large-scale heating applications and companies with very large footprints – such as expansive warehouses and assembly operations – may have more difficulty,” says Paul Holdredge, Director for Industrials and Transport at consultancy Business for Social Responsibility (BSR)."

So yeah: if we tiled the planet in solar panels right now, we couldn't just effortlessly and immediately switch over to renewable power for all our energy needs. Not just yet, these are problems that are being worked on, but I'm going to extend maximum charity to the Department of Energy and assume they were providing a simplistic answer to the simplistic demands of "no more fossil fuels! switch to renewables right now!"

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