Global net greenhouse gas emissions reach net zero before 2050.

Question

Six frontier AI models put this at 8% by 5 Sept 2076. Full reasoning from every model.

WillHappen.ai · Accepted Answer

8% — the median of 6 frontier models, resolving by 2076-09-05.

Answer

Gemini (Google): 6% — Net zero for all greenhouse gases requires offsetting stubborn agricultural non-CO2 emissions with unproven gigaton-scale CDR. Developing giants China and India officially target economy-wide neutrality for 2060 and 2070, making a global 2049 date unviable. Global non-CO2 emissions from livestock and nitrogen fertilizer lack viable zero-emissions substitutes without mass dietary shifts. I would raise odds if DACCS deployment costs fall under $50 per ton CO2 alongside rapid expansion of cheap fusion power before 2035.

Answer

Claude (Anthropic): 9% — Requires unprecedented global decarbonization speed; current trajectory and political inertia make this very unlikely by 2050. Current emissions are still rising or plateauing, not falling at the ~7%/year pace needed for net zero by 2050. Major emitters (China, India, US) have net zero targets set at 2050-2070, and historically climate pledges are missed or delayed. A breakthrough in cheap carbon removal plus binding global enforcement mechanisms would be needed to change this trajectory meaningfully.

Answer

GPT (OpenAI): 18% — This hinges on whether China, India and fossil-fuel exporters cut faster than current pledges imply after 2035. UNEP finds current policies point to roughly 2.8°C warming, far from the rapid global declines needed for net zero by 2050. China, India, the US, EU and major oil and gas producers must deliver deep cuts while scaling durable removals to billions of tonnes. I would raise this sharply if 2030 inventories show sustained global emissions declines near 7% annually and removals scaling credibly.

Answer

Grok (xAI): 2% — Global GHG net-zero by 2049 requires all major emitters to invert current trajectories in <24 years. China, US, India and others must enact and sustain policies far beyond 2025 NDCs, with inventories confirming balance by 2049. No historical energy transition or IPCC 1.5 °C pathway has delivered net-zero GHGs this fast; current policies still rise or plateau. Only cheap fusion-plus-DAC at planetary scale plus coordinated political reversal would shift this; neither is in evidence.

Answer

DeepSeek (DeepSeek): 12% — Net zero before 2050 requires global emissions to fall roughly 7% every year for 24 straight years, starting now. Annual global GHG emissions are still rising (~57 GtCO2e in 2024), and no year has ever seen a sustained 7% global decline outside a pandemic shock. The EU, UK, and Japan target 2050; China 2060; India 2070; the US has no binding federal net-zero law, so the 2050 threshold is missed by the largest emitters. The single development that would move this most is China peaking and cutting hard before 2030, which current NDC and coal-permit trends do not yet show.

Answer

Qwen (Alibaba): 4% — No major emitter has binding legislation or credible policy trajectory to hit net zero before 2050, let alone collectively. China targets 2060, India 2070, US has no binding federal net-zero law; these three alone account for ~50% of global emissions. Even optimistic scenarios from IEA or IPCC that reach net zero by 2050 require unprecedented deployment of CDR and policy acceleration that has not materialized as of… The only way this flips is if a breakthrough in cheap, scalable carbon removal (e.g., DAC below $50/t) triggers a cascade of national commitments, but no such technology…

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