Considering this and your other comments I really think you need to think a bit deeper about your answers. I believe in you, just ask "and then what happens" and I'm positive you'll figure it out.

▲ eru 5 hours ago | parent [-]

I've both opened windows and ran aircons. (Though I try to avoid doing both at the same time.)

Nothing bad happened.

▲ godelski 3 hours ago | parent [-]

  > Nothing bad happened.

Keep at it, you're almost there. You just forgot about one important variable: time

	▲	eru 2 hours ago \| parent [-]
		If done both for a long time over many years.