Many people seem to think that cooling effect is a completely new finding. That is a bit misleading—for example, https://www.economist.com/business/2018/10/27/sulphur-emissions-rules-for-shipping-will-worsen-global-warming and https://www.economist.com/science-and-technology/2018/11/03/shipping-regulators-plan-to-cut-greenhouse-gas-emissions are from 2018.
Many people seem to think that cooling effect is a completely new finding. That is a bit misleading—for example, https://www.economist.com/business/2018/10/27/sulphur-emissions-rules-for-shipping-will-worsen-global-warming and https://www.economist.com/science-and-technology/2018/11/03/shipping-regulators-plan-to-cut-greenhouse-gas-emissions are from 2018.