Is There a Discipline in Investment Bonds?

Rice lucy says the rush to find new power is interesting, especially hydrogen. But i can't follow all the types i hear of hydrogen, gree green, blue, brown, and most recently, gray hydrogen. How many versions are there? Hi lucy. Ah, well, it's a bit like carati bells. You know that theom of the old carais ye,. yellow, orange, purple, blue, green, brown and black. Here's how it goes. Brown is the very bottom of the line. It's from coal, et cetera, like a lilelatrope valleya., gray is also brown, but it's