this post was submitted on 11 Dec 2023
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Climate - truthful information about climate, related activism and politics.

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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 2 years 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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[–] LwL@lemmy.world 2 points 2 years ago

Cruise ships aren't all that much worse than long haul flights (specifics gonna depend on the ship and the plane but my first google results ended up with a 14 day cruise being roughly equivalent to four transatlantic flights) purely in terms of co2, just bc there are so many people on board. Though flights also need to cut emissions by a lot really, so that's still not great. And cruise ships tend to use fuel that releases other harmful chemicals beyond just greenhouse gases.

Still, to particularly focus on them rather than just one of many things that need to be reduced and also made more efficient feels a bit misplaced to me. Though I'd imagine that if sail container ships actually prove viable, sail cruise ships might follow.