this post was submitted on 20 Dec 2023
49 points (82.7% liked)

Climate - truthful information about climate, related activism and politics.

5282 readers
492 users here now

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.

Recommended actions to cut greenhouse gas emissions in the near future:

Anti-science, inactivism, and unsupported conspiracy theories are not ok here.

founded 1 year ago
MODERATORS
silence7@slrpnk.net
49
These scientists want to put a massive 'sunshade' in orbit to help fight climate change (www.space.com)
submitted 11 months ago by voxel@lemmy.ml to c/climate@slrpnk.net
33 comments fedilink hide all child comments
you are viewing a single comment's thread
view the rest of the comments
[–] GreyEyedGhost@lemmy.ca 1 points 11 months ago

I think we can all agree this is not a practical, short-term solution. Even the scientists say it would take 50 years. But this isn't going to blot out the sky, and it isn't going to be much of a platform for displaying ads.

From a practical standpoint, from earth, this thing will be slightly larger than the sun (so it reduces light from the sun over the entire earth). Just like with the sun or the moon, holding your thumb up at arms length will block most or all of it. It will also be fairly transparent, otherwise we would be getting far too little visible light, which would cause other problems. This means actually trying to look at it would be (almost) as inadvisable as looking at the sun. The visual advertising medium you can't look at, can't see details on if you're foolish enough to try, and is the size of your thumb at arms length is neither the sky-blotting structure nor the advertising platform you seem to think it would be.