this post was submitted on 21 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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Planting trees in cities will be an essential, life-saving adaptation to climate change in the coming decades (phys.org)
submitted 2 years ago by [email protected] to c/[email protected]
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cross-posted from: https://slrpnk.net/post/875222

We've known for a long time that trees can keep the built environment cooler, but with heat waves and deaths spiking worldwide, it has become an urgent need in many areas.

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[โ€“] [email protected] 3 points 2 years ago (1 children)

Yes it's a common design pattern in warmer European countries.

Although I rarely see (in Paris) the entire street covered by trees, usually at least pedestrian parts are in the leaf shade. In my smaller hometown (10km from Paris' edge) I'd guess we have 50/50 for entire coverage/partial

[โ€“] [email protected] 3 points 2 years ago

This study showed Paris with a dismal 9% canopy coverage, which was one of the lowest measured: https://senseable.mit.edu/treepedia

Perhaps if the trees are strategically located where they are needed it may have a bigger impact? But what I've read is that the benefits really kick in when you reach about 30-40% coverage which is substantially higher than virtually all cities.