There is a lot of climate alarmism embedded in their programming.

Again, it's vantage point. You -apparently- have already decided that climate change is "alarmism" and/or bogus. Sort of like a YEC watching a NOVA program on evolution...you're not going to accept it as valid no matter what they tell you.

NOVA is not political. It lays out the science in such a way that a layman can -usually- grasp it. My only complaint is that sometimes they dumb it down too much. But that is from the vantage point of a person with a graduate degree in physics. It's actually good that they do that, otherwise only people like me would understand it. I get that.

Perhaps you should reconsider your position on climate change, or at least really process what they are telling you in the NOVA programs to see if maybe your opinion is wrong. They put actual scientists specializing in relevant fields on their programs. I mean no offense by this, but your opinion is not "just as valid" as their facts and data. (Mine isn't either, nor is anyone else's. Science doesn't care about yours or my opinion. A person is either willing to learn new things, or they are only seeking confirmation of their prior opinion. I try to be the former.)