Unlike heating up balloons filled with different gases - climate change isn't something that can be demonstrated easily. I don't disagree with your statement in general, but when it comes to climate change I'm offended by any contrarian who passively sits back in their chair and shouts "prove it" - you aren't owed that.

Why that person that you are offended by cannot be offended by your statement of active screaming (sorry, just use your terminology)?