Library.

“Limiting global warming to 1.5°C above pre-industrial levels requires global net zero CO₂ emissions by around 2050.”

This matches the IPCC’s central benchmark for 1.5°C-consistent pathways. In pathways that limit warming to 1.5°C with no or limited overshoot, global net CO2 reaches zero around 2050 or the early 2050s. The main caveat is that this is a typical pathway result rather than an exact rule for every modeled scenario, and it must be accompanied by steep cuts in non-CO2 emissions.

“Human activity is the primary driver of observed climate change since the mid-20th century.”

This claim is true. The world's leading scientific institutions — including the IPCC, NASA, NOAA, and the National Academies — independently confirm that human greenhouse gas emissions are the primary driver of observed warming since the mid-20th century. Quantitative attribution studies show human activity caused approximately 1.07°C of warming, while natural factors (solar, volcanic) contributed only –0.1°C to +0.1°C. A small number of low-authority dissenting sources exist but provide no peer-reviewed evidence that overturns this conclusion.