Biochar
Biochar is mainly sold by fertilizer companies to people who grow plants. This may change. There are many tons of carbon dioxide in the atmosphere which is causing climate change. Many countries have agreed that this is a problem. In the future it may cost money to release carbon dioxide. If people who remove carbon dioxide are paid then there could be businesses which remove carbon dioxide for money. One way a business like that could remove carbon dioxide is by growing plants and turning them into biochar. This removes a large amount of carbon dioxide and could be very profitable in the future.