Hey there!
Every day, when we release large amounts of carbon dioxide and other gases through factories, cars, and other sources of pollution, we affect climate change because these emissions lead to it.
If a volcano were to erupt thousands of tons of emissions at once, it would be very harmful for the environment. Climate change would definitely be affected, as these emissions would likely make it much hotter, as this is what happens in most cases of climate change.
Hope this helps!