Yes, shouting is really going to help get your point across.
Thing is: if you look at your history books you'll see that climate change really isn't a modern thing. Most continents and most areas have seen major extremes over the centuries, from tropical climates to Arctic conditions.
But those are topics which some people don't like to hear, even if you can proof this based on facts, and insist that it's the humans who are responsible.
In the end the major problem is that most people think in absolutes and extremist measures, which obviously will result in resistance from people disagreeing. And then you'll get heated arguments which I personally refer to as "pissing contents" (I hope this expression is allowed, if not I won't repeat it) because in the end it's all about "who is right" instead of "how can we come to a mutual acceptable solution".
And the key to that is to listen to every opinion, even if you don't agree with them, without trying to ridicule or ignore it up front. And that's a courtesy more and more people seem to lack these days, with the obvious results.
