this post was submitted on 05 Aug 2024
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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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After a Study Found Lead in Tampons, Environmentalists Wonder if Global Metal Pollution Is Worse Than They Previously Thought (insideclimatenews.org)
submitted 3 months ago by jeffw@lemmy.world to c/climate
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[–] JATtho@lemmy.world 0 points 3 months ago

There are no "safe levels of lead", it's toxic as-is and bio-accumulates in the body, which is the main problem. It also doesn't matter in what chemical-compound or what route the lead comes in, it's still toxic as a heavy element.

Why is everything laced with lead then? Well, it's fantastically useful and cheap element, with wide applications... Paint, pipes, bullets, leaded petrol (the absolute worst incident), batteries, radiation-shielding, it was/is on everything. It's entirely a man-made problem.

Except modern day reality is that if we keep using it we'll all die or at least become dummer. This cost is obviously greater than banning/avoiding all uses of lead in the first place. In the science circles they are betting if a some new magic material contains lead, it'll never (or is allowed to) exit the lab.