Sorry for the late answear, didnt saw it. In this case, its a mix of both. I am not a scientist, so i cant make any analysis. But i read a lot in few last months. I searched for answears i could not find directly. And a small amount of mass(particles) into the air, can cause very big effects. Massive increase of co2 is warming, yes. And when u test tropical aerosols, warming will increase. Different aerosols have different effects on the atmosphere. And the heigt where they were injected also plays a role. As i done my private research, i came to the point, there must be more than only one sort of co2. And i was right.