Ioniq's hybrid beats Toyota's Prius narrowly in fuel efficiency. Nevertheless, low gasoline prices have compressed demand for hybrids and electrics, as consumers flock to bigger trucks and SUVs.
Automakers will build more hydrogen fuel-cell powered cars, while governments will help with infrastructure amid concerns of global warming.
GM, BMW and Hyundai respond to Trump's warnings, though GM says its plan to invest $1 billion in U.S. plants and equipment was in the works for some time.
Does this vision of autonomous driving hit too close to home for you?