Which kind of environmental change would a tornado be? short-term, because it occurs very quickly
long-term, because it lasts a long time
short-term, because it affects only a small area
long-term, because they have been happening for millions of years

Tornadoes tend to form under very specific atmospheric conditions — wind shear, or differences in wind speeds and direction; atmospheric instability; and moisture all fuel storms — and there are reasons to believe climate change is making those conditions more likely.