Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror

Comment Re:It's cheaper (Score 2) 28

Yes, however the cost of solar, batteries and smart grid infrastructure are declining exponentially, so you have to keep re-doing the comparison every so often. One could start with just solar, which in India might be valuable on its own to run an air conditioner during the hottest part of the day. Then add a little battery so you can charge your cell phone all night. Then a few years later get a bigger battery and run a refrigerator all night, and so on.

Comment Re:Testable Hypothesis (Score 1) 317

I bet if you added up the fractions of houses that "owners" own versus the large chunks of most houses owned by banks and other creditors, home ownership has actually fallen, and been time-shifted a decade or two later in most people's lives. Feelings about the future matter when prospective parents are deciding whether now is a good time to have a kid. If you've got a huge mortgage hanging over your head that might go underwater based on factors you can't control, perhaps you don't breed right now.
Also, although most people can eventually scrape together enough to buy a house, the average house they get will be smaller than in previous decades. There's a multimodal thing going on right now with the housing stock, with McMansions for some but also lots of teeny townhouses.

Comment Re: I'm going to have to tell you (Score 1) 87

In terms of overall energy system cost, the sweet spot is probably to get most of the primary energy from solar and wind, with lots of long distance cables, demand response (and other smart grid approaches) and a little storage, being sure to include any existing power dams in the storage network. Nuclear costs too much and takes too long to build compared with achieving the same overall system reliability with renewables + storage + networking etc. If cables are currently expensive, copper miners will probably step up and in ten years or so there'll be a glut of copper on the market.

Comment Re:What do you want us to do about it. (Score 1) 58

Although, as you say, it would take a lot of nukes to warm the oceans directly, a very few large nukes (perhaps as few as twenty, I read somewhere) might produce a nuclear winter effect that would noticeably cool the planet and impair agriculture. There are lots of climate engineering approaches that are less destructive, of course.

Comment Free Medical Care in Canada (Score 1) 127

You're right that medical care is free here in Canada, but it can require time, experience and energy to achieve desirable outcomes. Doctors and nurses here are on the whole competent and caring, but the system can be bureaucratic and in-demand procedures often have long wait times. Some high-cost treatments aren't covered under provincial health plans. None of this is to say that assisted suicide should be restricted "until wait times improve". If you let the anti-assisted-dying types decide when the system is good enough for people to make their own decisions, the answer will be never.

Comment Electricity Costs Trending Down (Score 1) 192

As solar + wind + storage + long distance transmission + demand response ramp up, electricity will become cheap. The biggest cost will be paying off and decommissioning stranded fossil and nuclear assets. Over the coming decades energy uses that currently make no sense because of the high cost of energy will become feasible, e.g. garbage mining, large scale seawater desalination, effective recycling, cheaper manufacturing, higher energy mining processes to get the most out of low-grade ores, sucking excess CO2 out of the air and burying it, etc etc. Houses cost a lot? Building and servicing new towns becomes affordable when energy is cheap. Birth rates should begin to recover within the next ten or twenty years.

Comment Demand Response vs. Baseload (Score 1) 73

A good way to move past the base load concept is to overbuild renewables to a point where, between networking, storage and a very large capacity, there's always going to be enough power for critical needs. This means that most of the time there will be lots of extra power, and this can dispatched (via a demand response system) to uses that aren't time sensitive like smelting aluminum and generating green hydrogen. Because renewables are cheap the combined PV + wind + storage + transmission + dispatch system will cost less and can be built faster than anything involving nuclear, which always costs at least three times the agreed price.

Comment Electricity Will Soon Be Cheap (Score 2) 187

As solar + wind + long distance transmission + storage ramps up, electricity will become progressively cheaper. It'll then take a while to electrify a widening range of industrial machinery and processes, but ultimately the cost of everything will go down, as will the cost of transporting everything to where we want it to be.

This is encouraging, as an economy is a mechanism that turns energy, raw materials and human attention into goods and services that people want. Cheap energy makes it easier to obtain, transport and process raw materials. Hopefully we'll experience a return to 1950's levels of per-capita energy availability, when it was possible for a single-income middle class family to afford a new three- or four-bedroom house and all its infrastructure.

Comment Renewables Require Less Workers (Score 1) 132

As solar, wind and geothermal replace fossil energy sources, the energy industry's headcount will drop. The service requirements for a windmill or solar panel are small compared to the manpower required for oil extraction, refining and distribution. Grid-connected batteries and smart grids will also be relatively low maintenance. Overall, however, employment will increase as energy becomes cheaper. Cheap electricity accelerates the rest of the economy, particularly as construction equipment and industrial equipment and processes become electrified. As an economy becomes able to deliver more of the goods and services consumers want, demand increases.

Slashdot Top Deals

"Remember, extremism in the nondefense of moderation is not a virtue." -- Peter Neumann, about usenet

Working...