this post was submitted on 11 Dec 2023
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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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‘Megayachts’ are environmentally indefensible. The world must ban them. (www.theguardian.com)
submitted 11 months ago by lettruthout@lemmy.world to c/climate@slrpnk.net
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“The rich gazed at their superyachts, and decided they were not enough. The new breed of megayachts, which are at least 70 metres (230ft) in length, may be the most expensive moveable assets ever created.”

“First and foremost, owning a megayacht is the most polluting activity a single person can possibly engage in. Abramovich’s yachts emit more than 22,000 tonnes of carbon every year, which is more than some small countries. Even flying long-haul every day of the year, or air-conditioning a sprawling palace, would not get close to those emissions levels.

The bulk of these emissions happen whether or not a yacht actually travels anywhere. Simply owning one – or indeed building one – is an act of enormous climate vandalism.”

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[–] Maeve@kbin.social 1 points 11 months ago (1 children)

I don’t know, but would they be cleaner and greener? I specified two-person because that’s the last boat on which I sailed. It was a long time ago.

[–] activistPnk@slrpnk.net 1 points 11 months ago* (last edited 11 months ago) (1 children)

I just asked because you said it was hard work on a 2 person vessel. I don’t sail so I was just wondering why that would be. Is it labor intensive with moving the sails, or more mentally fatiguing to constantly calculate where to position sails? I’ve not so seriously considered crossing the Altantic (which I heard requires a year of preparation). So to the question as to whether an automated sailboat for two would be greener, I would say /yes/ to the extent that it might encourage more people to sail.

[–] Maeve@kbin.social 2 points 11 months ago

To me, the mental part is easy, but I suppose it would depend on how familiar one is with the winds and tides. It is extremely labor intensive.