Rising carbon dioxide levels now detected in human blood

Global emissions, responsibility, and politics

• Debate over cumulative vs annual emissions: some stress historical responsibility (cumulative CO₂ driving today’s ppm), others focus on current major emitters and manufacturing shifts.
• Calls to “stop pointing fingers” vs arguments that large economies still have outsized power to harm or help.
• Sharp disagreement over US party politics:
  • One side says one party is uniquely obstructionist and the other would act if empowered.
  • Others argue both major parties had power and largely failed or moved too slowly, citing structural constraints (filibuster, narrow majorities, “vetocracy”).
• Mood ranges from “it’s too late, worst scenarios locked in” to “trajectories are improving and activism still matters.”

Clean tech, nuclear, and transition pace

• Strong optimism about solar, wind, batteries, and electrification, citing rapid capacity growth and falling costs; claim that existing tech can cut emissions ~80–90% without “degrowth.”
• Others emphasize that fossil fuel use must be dismantled faster than many political and economic actors want.
• Nuclear is contested: some say it’s essential and has been over‑regulated; others argue build times are too long compared to solar/wind rollout.
• Fusion framed metaphorically as “already solved at a distance” via sunlight; real fusion reactors seen as far off.

Health and cognitive impacts of rising CO₂

• Multiple links and anecdotes about elevated CO₂ (often 1000–1500+ ppm indoors) reducing cognitive performance, causing fatigue, headaches, irritability, and possibly long‑term decision‑making degradation.
• Some find this more frightening than climate impacts because it directly erodes IQ and focus.
• Counterpoints note that current atmospheric CO₂ (~428 ppm) is far below levels in stuffy rooms and far from acute poisoning, but chronic sub‑toxic effects are still concerning and “making us dumber” is repeated often.

Indoor air, lifestyle, and mitigation

• Modern sealed buildings, HVAC efficiency, and long indoor hours likely raise everyday exposure; examples include schools sitting around ~1200 ppm CO₂ all winter.
• People experiment with home CO₂ monitors, ventilation, HRV/ERV, and simple actions like opening windows.
• Interest in home CO₂ scrubbers, but practical issues (consumables, regeneration, unknown effects of very low ambient CO₂).
• Plants and small algae setups are reported as surprisingly ineffective at offsetting even one person’s CO₂ output.

Fossil fuels, prosperity, and transition

• One line of argument: fossil fuels underpinned the Green Revolution, mechanization, and huge quality‑of‑life gains via high energy return on investment.
• Others counter that “necessary then” is not “good now”; continued large‑scale use is unsustainable, and earlier transition paths were ignored.
• Consensus from several comments: multiple truths coexist — fossil fuels brought vast benefits, their continued use is dangerous, many profited and some lied, and the transition will be costly but morally and practically necessary.

Individual vs systemic action and consumption

• One thread urges drastic personal cuts (especially meat/dairy), calls “regenerative ranching” mostly vibes, and emphasizes overconsumption and status signaling.
• Strong rebuttal: corporate propaganda overemphasized individual footprints; structural regulation and corporate accountability (including pricing externalities) are essential.
• Debate over whether “consumerism” itself is the problem vs the carbon intensity of energy and production.
• Recycling practices (multi‑stream vs single‑stream) used as an example of how corporate incentives and system design matter more than individual labor at the bin.

Nutrition, obesity, and CO₂

• Speculation that elevated CO₂, by accelerating plant growth and diluting nutrients, might contribute to obesity.
• Cited studies show reduced protein and micronutrients in crops at higher CO₂, and broader concerns about long‑term nutrient decline from intensive agriculture and rising CO₂.
• Others argue the link to obesity is weak: current CO₂ levels in studies are often higher than today’s, effects are modest so far, and obesity tracks more clearly with diet changes and sedentary lifestyles.

Study design and confounders

• Skepticism about using serum bicarbonate as a proxy for CO₂ exposure, given instrument changes over time and confounders such as rising obesity and other health trends.
• Some note that changes in building design and time spent indoors may be at least as important as outdoor CO₂ increases, and that the study does not clearly separate these effects.