The state of carbon dioxide removal

Role and Effectiveness of Carbon Dioxide Removal (CDR)

• Several commenters argue current CDR deployment is tiny, statistically negligible, and often used as a pretext to grab subsidies.
• Others counter that CDR is now structurally necessary: IPCC reports say net-zero alone will not stabilize temperature; historical emissions must be removed.
• There is concern that large-scale CDR deployed while grids are still fossil-heavy would be “digging a hole and filling it back in” energetically and economically.
• Scale and cost look daunting: trillions of tons of excess CO₂ mean tens to hundreds of trillions of dollars even at optimistic $20–100/ton, raising doubts about feasibility.

Decarbonization vs. CDR and Policy

• One camp insists the only real solution is sharp reduction in emissions (fossil fuels, high-intensity manufacturing), viewing many CDR schemes as profit-driven distractions.
• Others say it is “net zero AND carbon removal,” not either/or.
• Several warn that relying on “tech will save us” enables political delay; only strong policy and structural change can deliver required emission cuts.

Solar, Nuclear, Storage, and the Future Grid

• Heated debate on whether solar can become the dominant energy source.
• Pro-solar arguments: it is now the cheapest and fastest-growing power source; PV + batteries can already outcompete new coal and gas in many peaking applications; continued learning curves and EV-driven battery scaling are expected.
• Skeptical views: intermittency (night, winter, multi-day clouds), insufficient affordable storage, and grid costs mean solar can’t fully replace dispatchable fossil or nuclear; absolute fossil use is still hitting records even as growth decelerates.
• Nuclear is framed by some as reliable, cheap baseload without storage needs; others see it as more expensive than PV + storage.

Carbon Burial and Nature-Based Approaches

• Distinction is made between mere burial and true chemical binding; some warn liquid CO₂ in the subsurface may re-emerge, others argue geological reservoirs can safely hold it for millions of years if properly sealed.
• Trust in fossil fuel companies and regulators to manage underground storage is widely questioned.
• Tree planting, wood vaults, biochar, and timber buildings are discussed; these are seen as beneficial but, at global scale, likely to offset only a small fraction of emissions, especially given fire, pests, drought, and land-use pressures.

Emissions Trajectory and Outlook

• Some data points suggest power-sector CO₂ may be at or just past peak, with renewables (especially in China) growing quickly.
• Others stress that overall CO₂ levels and cumulative emissions are still rising fast; actual atmospheric drawdown will likely take many generations.