this post was submitted on 17 Mar 2024
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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world. About 1C of total warming. Second chart: about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability. Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases. About 0.5C of cooling with large error bars from SO2.

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A cargo ship’s ‘WindWing’ sails saved it up to 12 tons of fuel per day (www.popsci.com)
submitted 10 months ago by [email protected] to c/[email protected]
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[–] [email protected] 130 points 10 months ago (3 children)

Hundreds of years of innovation in water travel, and we come back to a sail. Granted, a metal one, but still a fucking sail.

[–] [email protected] 71 points 10 months ago (1 children)

Hard to beat the efficiency of just having energy delivered to you for free...

[–] [email protected] 40 points 10 months ago

Those damned sails stealing the earth's winds for free.

Global warming you know why it's happening? Because the sails are all stopping the global winds! No winds to blow the heat away and it all warms up! BAN SAILS TODAY to MAKE AMERICA GREAT AGAIN!

[–] [email protected] 56 points 10 months ago* (last edited 10 months ago)

The scale of a sail needed to propel a giant cargo ship is really quite a bit different from what you might imagine on an old frigate, aka a "pirate ship." Making a sail that large out of traditional materials is not feasible, and would require a ton of people to operate it. One of these monstrosities is staffed by probably less than 20 people, and labor is expensive, so this sort of computer operated sail can be both feasible and cost effective, whereas old school type sails were not

[–] [email protected] 37 points 10 months ago

What's old is new again. Time is a flat circle. But really, technology has a good habit of compounding gains. One new idea applied to a hundred old ones really gets innovation running hot.