Our global economy is undergoing the "Great Transition" from an energy system based on fossil fuels to one based on clean, renewable energy sources and technologies. So as longtime advocates for a safe, just and sustainable future, we at As You Sow decided to partner with our friends at Corporate Knights and develop the Carbon Clean 200—to start a broad and dynamic conversation about how all investors can create a clean energy economy and how best to recognize companies that are already on this path.