Hybrids, PZEV, Clean diesel, plug-in, plug-in Hybrid…. With so many emerging green automotive technologies these days, it can be hard to keep up. This section provides you with an introduction to all of our relevant green technologies. In addition, any of our articles, news and events related to green engine types and technologies can be found here. If you’re looking for the latest news about green technology, this is the place to start.