Table 2 Comparison of generated answers to questions 1 and 2 from hybrid ChatClimate, ChatClimate, and GPT-4.

Yes, it is still possible to limit global warming to 1.5 °C, but it would require immediate, deep, rapid, and sustained reductions in greenhouse gas emissions, including CO2 and methane (Page:31, IPCC AR6 WGIII Chapter03). Scenarios limiting warming to 1.5 °C with no or limited overshoot show that net energy system CO2 emissions must fall by 35–51% by 2030 and 87–-97% by 2050 (Page:43, IPCC AR6 WGIII Technical Summary). Net electricity sector CO₂ emissions would need to reach zero globally between 2045 and 2055 (Page:3, IPCC AR6 WGIII Chapter06). However, the likelihood of limiting warming to 1.5 °C with no or limited overshoot has decreased compared to the Special Report on Global Warming of 1.5 °C due to the rise in global greenhouse gas emissions since its publication (Page:4, IPCC AR6 WGIII Chapter03). Only a small number of published pathways achieve this target with- out overshooting over the 21st century (Page:31, IPCC AR6 WGIII Technical Summary). In summary, while still possible, limiting warming to 1.5 °C would require immediate and drastic action to reduce

It is still possible to limit warming to 1.5 °C with no or limited overshoot, but the likelihood has decreased since the Special Report on Global Warming of 1.5 °C (SR1.5) due to the rise in global GHG emissions since it was published. This has led to higher near- term emissions (2030) and higher cumulative CO₂ emissions until the time of net zero (medium confidence). Limiting warming to 1.5 °C requires deep, rapid, and sustained reductions in greenhouse gas emissions, including methane, alongside rapid reductions of CO₂ emissions to net zero IPCC AR6 WGIII Chapter03, Page:4, IPCC AR6 WGIII Technical Summary, Page:31.

Limiting global warming to 1.5 °C is becoming increasingly challenging due to the continued rise in greenhouse gas emissions and the slow pace of implementing effective climate policies. However, it is not entirely impossible. Achieving this goal would require rapid and far-reaching transitions in energy, land, urban infrastructure, and industrial systems. This includes drastically reducing greenhouse gas emissions, increasing renewable energy sources, improving energy efficiency, and adopting sustainable land use practices. The Intergovernmental Panel on Climate Change (IPCC) has outlined various pathways to achieve this target, but it requires immediate and ambitious action from governments, businesses, and individuals worldwide.

Accuracy: 5

accuracy: 5

accuracy: 3

We are likely to reach 1.5°C of global warming be- tween 2030 and 2052 if the current rate of warming continues (high confidence) (IPCC AR6, Reference: IPCC AR6 WGI Chapter01, Page: 44). However, the exact timing may vary depending on the emissions re- duction pathways and efforts to achieve net-zero CO₂ emissions (In-house knowledge).

We are likely to reach 1.5 °C of global warming between 2030 and 2052 if it continues to increase at the current rate (high confidence). Reference: IPCC AR6 WGI Chapter01, Page: 44.

As an AI, I cannot predict the exact year when global temperatures will reach 1.5 °C above pre-industrial levels. However, according to the Intergovernmental Panel on Climate Change (IPCC), we could reach this threshold between 2030 and 2052 if global warming continues at its current rate. The actual timeline depends on various factors, including greenhouse gas emissions, climate policies, and global efforts to mitigate climate change.

accuracy: 5

accuracy: 4

accuracy: 2