this post was submitted on 19 Jul 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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From David Sirota’s The Lever

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[–] theacharnian@lemmy.ca 11 points 1 year ago* (last edited 1 year ago) (2 children)

Why hundreds of years? American and Canadian cities became car-dependent sprawls in the span of a few decades. A concerted effort to redesign them would not of course have results in months, but 10-20 years are enough to completely transform them.

Also, when we are talking "redesigning", don't imagine SimCity like buldozing and rebuilding. It can start with doing away with zoning regulations mandating single family homes everywhere, doing away with strict commercial/residential zoning, doing away with parking minimums and allowing people to sell off parking lots for development. Then couple this kind of libertarian-style deregulation, with socialistic-like public investment on public transit and amenities (that should be much cheaper for denser neighbourhoods). In the US and Canada, good public transit will probably mean trams and trolleys, or (sigh) buses. Finally, establish norms that require good cycling infrastructure on any new road being built and any old road being repaved. It won't be too long for change to happen.

Finally, one more thing: E-bikes and e-cargo-bikes, along with quick infrastructure fixes (e.g., blocking off some roads or blocking off one direction in stroads with islands to make them transit and bike-only) are a much much better stop-gap solution than electric cars. The vast majority of car trips are with only a single person. Why haul a few tonnes of steel and plastic around? Instead, ebikes need much smaller batteries, and cost only a fraction of the cost. They are fast, and comfortable and can cover larger distances and you don't need to be sweaty when you get there.

[–] Cannacheques 3 points 1 year ago (1 children)

The problem is that the current trends reflect what people have wanted, if you want a change in the system then you need a clear cut plan, not just deregulation.

[–] theacharnian@lemmy.ca 3 points 1 year ago

It's not as if there are no people who have thought deeply of this. For example: https://www.strongtowns.org/

[–] discodoubloon@kbin.social 3 points 1 year ago (1 children)

The deeper I look at them the more insane cars actually seem. I understand the usage of freight trucks and things like that but cars are genuinely wasteful in most senses.

[–] snooggums@kbin.social 1 points 1 year ago (1 children)

In cities personal cars are terrible.

In rural areas they are vital.

[–] GuilhermePelayo 1 points 1 year ago

Agreed but, not always. Not every rural town in the world implies isolated homes. Besides if you look at it more as a principle and less of a rule, as town grows you invest in adding public transportation as needed. But yes the more rural a place is the more car dependent it's going to be, but that's not that bad, most rural places also have much less population so it also has a much smaller impact.