TL;DR: CO2 is by far the largest contributor to the climate crisis and rightfully the largest market. It might be surprising to some that there is no significant tradable market for 1/4th of the total global greenhouse gas emissions - methane & nitrous oxide (N2O). It’s possible to buy and sell carbon credits (CO2) but not methane & N2O credits. The total market value of the latter two gases is close to $40T. Media coverage and thus research & businesses focus almost exclusively on CO2. The vast methane & N2O markets need to be unlocked now to avert the climate crisis.
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