“…However, hope is important (doi:10.1136/bmj.o2411), and it exists in individual action as well as in government, corporate, industrial, and institutional commitments and strategies that deliver zero carbon emissions (www.nationalgrideso.com/future-energy/our-progress-towards-net-zero/net-zero-explained/what-net-zero-and-zero-carbon). 23 Net zero is already not enough. Time is short and we must act, argues Montgomery.…”