What’s the difference between a hybrid and a plug-in hybrid?

Can I drive alone in the carpool lane? Am I eligible for any tax breaks or rebates for getting one of these electrified cars? What’s the difference between a hybrid and a plug-in hybrid? How far will these cars go on battery power before the juice runs out? And is the range affected by weather? How long does it take to recharge the battery? Do I need a charger installed at my home? If so, what kind—and what’s it cost? How long will the high-voltage battery last until it needs to be replaced? What’s the warranty on these batteries? Does it cost more to maintain these vehicles than a regular, gasoline-only car? How does a fuel cell vehicle work? How safe is the Clarity Fuel Cell? How far will the 2018 Clarity Fuel Cell go on a full tank of hydrogen? How hard is it to fill the hydrogen tank? How long does it take? How do I find the nearest hydrogen station?