Man can, and sometimes does, alter the weather. In some cases it is deliberate. In some cases it is accidental, and the results are not done deliberately. In other cases we have no idea how the weather has been impacted, but the possibility is there. Sometimes, we have to go about our business not knowing, and that is because we have altered the atmosphere, but cannot fathom the totality of what we have caused.
Some changes are beneficial, others are harmful. In the discussion below we can see that sometimes a benefit and a problem are both the result. It was once suggested by a scientist that vehicles passing each other on a highway can cause a rotation, and that angular momentum can contribute to a tornadic storm in some distant place and some future time. But this does not mean we should all feel responsible for every tornado if we have driven past another moving vehicle. However, other cases are more profound, and we can react if we understand.