Unfortunately we have to do both. We need big industry to reduce but we also need a massive change in our behaviors. Industry must be forced to make these changes because they are purely profit driven and don't take into account 2nd order costs of their actions. People can make choices to improve their personal impact on the environment, and every little bit counts.

For example, if everyone who can uses more public and active transportation, then that leaves more capacity for those who can't. Making less cars is better than making more EVs. Personal transport is a significant source of pollution even if it's not close to the biggest.