California is not like other states in this regard. First is its size. California's population and GDP are more comparable to a country than most US states. "I

California is not like other states in this regard. First is its size. California's population and GDP are more comparable to a country than most US states. "If California were a sovereign nation (2020), it would rank as the world's fifth largest economy, ahead of India and behind Germany" [1]. California also has a larger population than Canada [2, 3]. As a result, California has a long history of making its own rules and getting compliance. Second is that these types of California laws tend to affect more than just California. Several other US states and even some Canadian provenances have banded together with California and enforce California's regulations in their jurisdictions as well. ~15 US states and the Canadian province of Quebec enforce CARB standards [4]. Further, the national Government of Canada is cooperating with California on greenhouse gas emissions mitigation [4]. [1] https://en.wikipedia.org/wiki/Economy_of_California https://en.wikipedia.org/wiki/Economy_of_California [2] https://www.census.gov/quickfacts/CA https://www.census.gov/quickfacts/CA [3] https://en.wikipedia.org/wiki/Canada https://en.wikipedia.org/wiki/Canada [4] https://en.wikipedia.org/wiki/California_Air_Resources_Board#Section_177_states https://en.wikipedia.org/wiki/California_Air_Resources_Board...