A question: why anything about global warming gets downvoted, even popularly readable explanation of the fairly mainstream scientific consensus?

I question the generalisation "Of the comments by User:Dmytry that have been downvoted recently some of them have been about global warming" --> "All discussion of global warming gets downvoted". In fact, the claim can be trivially refuted by finding discussion relating to global warming that is not downvoted. As of the time of this comment one can find examples of comments discussing global warming that are upvoted or neutral by following the link to the Dmytry's comment page, finding the heavily downvoted comments about global warming and then following links to the (currently upvoted) parent and children comments.

Once again, not all instances of people downvoting are part of a conspiracy. Sometimes it just means people disagree with you or object to your style.

As for whether the downvoted comments in question are, in fact, "popularly readable explanation of the fairly mainstream scientific consensus" - I have no idea. I have very little interest in the subject and have not followed the conversation closely. Someone else would have to give their evaluation.

As far as I'm concerned the global warming is a known problem with known insurmountable political (cooperation) problems preventing us from taking the drastic measures needed to solve it.

Global warming is not an existential risk regardless of its truth value.

There's a three-pronged answer to this, as I see it.

First: there's a tacit moratorium on partisan-coded issues around here which do not directly concern the science of rationality or (to a lesser extent) AI. Even those on which a broad consensus exists: the reasoning most often given is that a vocally partisan position on such topics would position LW to attract like-minded partisans and thus dilute its rationality focus. The politics of religion is something of an exception; it's essentially treated as a uniquely valuable example of certain biases, though I suspect that status in practice has more to do with the grandfather clause. Anthropogenic global warming is not a uniquely valuable example of any bias I can think of; it's a salient one, but salience often comes with drawbacks.

Second: LW is not a debunking blog, nor a forum dedicated to cheering scientific consensus over folk wisdom, and it should not be except insofar as doing so serves the art and science of rational thinking. There's considerable overlap between LW's natural audience and that of sites which are devoted to those topics, which has on occasion misled (often ideologically opposed) newcomers into thinking it's such a site, but even if a general consensus exists that LW's theory and practice tends to lead to certain positions, it behooves us to guard against adopting those positions as markers of group identity. The easiest way to do that is not to talk about them.

Third, and probably most embarrassingly from the standpoint of healthy group epistemology: by the last census/survey LW is disproportionately politically libertarian, though adherents of that ideology are an absolute minority ([left-]liberalism is slightly more popular, socialism slightly less, other political theories much less). The severity of, proper response to, and to a lesser extent existence of anthropogenic global warming remains an active topic of debate in libertarian circles, though less so in recent years. Higher sensitivity to AGW than to other conservative-coded positions may in part be a response to these demographics.

The global warming is our first example of the manmade problems which are going to kill us if there is no AI.

Er, what? What about diseases promoted by high-population densities in cities and spread via modern international travel? Surely those will kill many more - and are more important in practically every way.

The global warming is our first example of the manmade problems which are going to kill us if there is no AI.

Road traffic accidents kill over a million people per year. I doubt global warming will ever kill people at anywhere near that rate. But for all that, we talk about global warming a lot more than road accidents.

There's an extent to which I am totally willing to have a moratorium on global warming. After all, you don't try to convince a religious fundamentalist that they're wrong by going "you're totally wrong, you have no sound basis for thinking the bible is inerrant" - anything that even assumes that is just going to raise their cognitive walls. You change their mind by helping them develop their critical thinking skills. Similarly, I wouldn't say to a fundamentalist-equivalent skeptic "here, have a link to some IPCC report that shows that you're wrong, I'm sure you can check it out yourself." Counterproductive again. So even if theism or global warming are useful examples, I'm willing to avoid them, or certain statements about them, in many cases.

But at the same time I'd rather not just ignore the issue. Fortunately, I've found a certain forum that lets community members write posts to develop readers' critical thinking skills :D So maybe I'll do that.

For that to be important it is sufficient to have 50/50 risk of global warming Even probabilities less than 0.5 for the 'strong' warning scenarios still are a big factor - in terms of 'expected deaths' and 'expected suffering' considering how many humans on this planet lack access to air conditioning.

The main problem with global warming is not that people who can't afford air conditioning will be less comfortable -- the warming is a few degrees, so people wouldn't even notice it without measurements. The problem is that the warming might lead to rising sea levels (and there are a helluva lot of people living near the sea), and maybe (I'm not sure these things are well-understood) more and stronger hurricanes, and stuff like that.