When hybrid cars first hit the scene in 1999, a gas-electric was the ultimate badge of earth-friendly cool. Toyota Prius models ferried Hollywood glitterati to the red carpet, and a decade later the original Chevy Volt made a huge splash before Tesla became a cult phenomenon. Looking toward the next few years, automakers have focused their green car dollars on full electric cars and plug-in hybrids. Here’s a look at the top 10 reasons to be excited about green motoring between now and 2018.