this post was submitted on 04 Oct 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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Climate scientist 'could lose job' for refusing to fly (phys.org)
submitted 1 year ago by GreyShuck@feddit.uk to c/climate
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A climate scientist on Wednesday said he was being threatened with the sack for refusing to fly back to Germany from a research trip in Papua New Guinea.

Gianluca Grimalda, a senior researcher at the Kiel Institute for the World Economy (IfW Kiel), has spent six months investigating the social effects of climate change in the Pacific island country.

Grimalda made most of the outward trip to Papua New Guinea by land and sea, taking 35 days to travel around 16,000 kilometers.

He wished to return entirely by cargo ships, ferries, trains and buses, he said in a statement shared by the campaign group Scientist Rebellion.

But the IfW Kiel is allegedly insisting approval for his trip ran out on September 10 and he must return immediately by plane.

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[–] labsin@sh.itjust.works 22 points 1 year ago* (last edited 1 year ago)

You'd be surprised. Long trips literally produce tons.

The emissions of this trip, if every passenger flew economy, is >2 ton CO2 per person.

The annual emission of a eu citizen is 4 to 7 ton a year so for a month that's 350kg, given that he is not living on eu standards it's quite safe to take the lower bound. The co2 of hitching on cargo ships and trucks is neglectabel, but if he has to catch a bus for most land travel, we can set it to 500kg max.

Taking the plane emissions at the minimum bound and the alternative maximal, it's still 3x less. And personal emissions I think we could reduce by a lot in the next 10 years with greener agriculture, industry and just consuming less. Plane travel will not improve drastically the coming 20 years