Kachan & Co. has created a new taxonomy for cleantech/greentech categories to better reflect innovation since the original 2002 definition. The new taxonomy organizes cleantech into 8 overarching categories - energy, energy storage, efficiency, transportation, air & environment, clean industry, water, and agriculture - and provides further subcategories within each. This new taxonomy aims to more accurately categorize technologies, rather than projects or value chain players, and includes newly emerged and emerging technologies not captured by legacy definitions.