1. Give examples of externalities that we observe, and even
contribute to, in our daily lives. Briefly discuss their potential
economic and social costs.
2. As of 2019, over 70 jurisdictions, representing about 20% of
global greenhouse gases emissions, have put a price on carbon. Can
a "national" carbon tax reduce "global" warming? What other
'climate actions" should be taken by individuals, businesses and
governments?