this post was submitted on 13 Nov 2025
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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.

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

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cross-posted from: https://lemmy.sdf.org/post/45538468

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China’s NDC [Nationally Determined Contribution] stood in sharp contrast to a complete withdrawal from the Paris Agreement by the world’s second-largest emitter and biggest historical emitter—the United States. China’s limited commitment coupled with this U.S. exit has caused many to doubt the viability of global climate progress under UN-led forums during a critical Conference of the Parties (COP) meeting in Brazil.

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China is the world’s largest emitter today, making up about a third of global emissions. The country overtook the United States in greenhouse gas emissions in 2006, and in the past decade, China’s emissions have only continued to climb. Since 2015, 90 percent of the world’s growth in emissions is traceable to China.

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But these commitments [to reduce greenhouse gas emissions by 7–10 percent below peak levels by 2035] fall short from what analysts forecast could keep global warming below the 1.5°C threshold established under the Paris agreement. Research from nonprofit organization the Asia Society found that China would need to reduce its greenhouse gas emissions by 30 percent from peak emissions by 2035 to still align with the 1.5°C goal established under the Paris Agreement. Moreover, China does not specify when it will “peak” its emissions, leaving the country flexibility to increasing emissions in the next decade.

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What’s China’s NDC strategy?

Beijing could have chosen to under promise and over deliver on its global climate pledges. The Chinese government has historically followed this approach, achieving several of its past climate commitments ahead of schedule. Committing to less restrictive and ambitious NDCs grant China more flexibility in its economic, technological, and industrial development over the next decade.

In addition, Beijing is facing internal headwinds that could circumscribe climate ambition. For example, in February, China’s central government issued a directive for provinces to develop new pricing mechanisms plans for solar and wind power by the end of 2025. As of October, only about a half of the provinces had finalized the new rules.

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[–] claimsou@lemmy.world 3 points 23 hours ago

China could have politically scored many points by replacing a failing USA. I feel like they missed their chance.