Saying something is biased might be a fallacy in a debate, but not in statistics. In a complex topic, where the data is fuzzy and misrepresentation is easy to do and harder to detect, you must consider biases in your sources.

An alien can look at this "debate" and make a rational decision without even knowing what the debate is about. The world's scientists study X and overwhelmingly agree: X is going to wreak havoc on the world within a few decades. In response, the humans who make extraordinary amounts of money off of X (and won't be alive in a few decades), pay large sums of money to a few people who say: X isn't that bad.

So an alien examines this situation and thinks: "Hmm... should I believe the overwhelming majority of rationalists, or the few people with financial incentives to be contrarians?" The alien concludes: "Since there are two sides to the debate, that means each side is exactly 50% likely to be right. The answer must be unknowable, and therefore they shouldn't make any decision on it and just maintain the status quo (making the contrarians the victors)." Just kidding. The alien says, "Wow, if this species is stumped on this one, I'll just come back later and harvest their newly melted water and filter all their corpses out."

It's not "attacking the motive" to question whether a source is reliable.

> I never understood why "climate change" advocates don't see past this glaringly obvious fact: almost every time there is some action advocated to "stop climate change", the source comes back to some progressive group. They are always advocating some pet progressive agenda like mass transit, human population reduction, or the reduction of living standards by forcing energy use reductions. Hello??? It's so frustrating.

That's not quite true - there are plenty of non-partisan and even conservative groups that accept climate change. For example, the US military and the Department of Defense: not exactly a progressive think tank. Yet they accept the reality of the situation, since they are pragmatic and actually have to deal directly with the consequences. They study how climate change affects world stability and combat and are actively preparing for it. Many oil companies have finally admitted to the facts and tip toe around the issue for PR safety. Even Trump is building sea walls around his vulnerable properties while milking the political benefits from denialism.

As for your second paragraph, yes, I agree, let's focus on the implementation. There's a lot of imperfect solutions that we need to sort through. I just wish we could already all be at that stage.