A safe climate with no more than 1.5°C warming will require “net-zero emissions” by 2050. More and more nations, states, cities, companies, and universities are embracing this target. This presentation will address the vigorous debates over questions such as:

- Can renewables supply 100% of electricity? 100% of all energy?
- What role should carbon capture and storage (CCS) play? In the power sector? In reducing industrial emissions? In “negative emission” technologies such as bioenergy with CCS or direct air capture?