As IPCC notes, reaching net zero anthropogenic CO2 emissions in the next three
decades is a requirement to limit warming to 1.5 簞C. It would require rapid and far- reaching system transitions in energy, land, urban infrastructure, and industrial systems, which are unprecedented in terms of scale. However, this Hercules ambition is becoming mainstream, countries with net-zero targets together represent 61% of global emissions and net-zero targets already become legally binding in 14 nations. Taiwan is also working on net-zero pathway, and the congressmen from different political parties and the climate advocates are pushing hard to make it legally binding. But the fundamental change in all sectors needs a wide portfolio of mitigation options and a significant upscaling of investments.