Why do you need any actual price tag? Put it into market. If company releases carbon, it must buy capture carbon futures. If company captures carbon, it can sel

Why do you need any actual price tag? Put it into market. If company releases carbon, it must buy capture carbon futures. If company captures carbon, it can sell capture carbon futures. Add government subsidies, like 98% in 2021, 0% in 2071, so companies have enough time to adapt and restructure their business.