Tesla Motors has earned more than $295 million in state cap and trade-type emission credits during the past three years for a battery-swapping technology customers weren’t getting, a Watchdog investigation reveals. In fact, the electric car company, owned in part by billionaire Elon Musk, may have earned credits up to nearly half a billion dollars in value from the 11 states that use the Zero Emission Vehicle barter as part of a green auto industry mandate. California created the program and leads the pack, doling out $173 million in credits to the Silicon Valley-based Tesla. Tesla claimed the credits between...