Dave Roberts has a theory:
Beliefs tend to be reverse engineered, as it were: People tend to construct an identity around what they (and their tribe) do. That suggests that they will only construct a different identity when they start doing different things. So imagine the same guy who rejected human-caused climate change in the poll.
Imagine that bike riding were made convenient and useful enough that he started doing it. Imagine that his neighbors started getting solar panels, to the point that he felt pressured to do it, and he became a power producer. Imagine he's in the military and his platoon started insulating their tents and carrying solar water purifiers.
Next thing you know, he's a guy who uses solar power and rides a bike. His behavior has changed, so he's telling a different story about himself. That new story, that new identity -- the guy who rides a bike and uses solar power -- is much more likely to incorporate climate change concern than the previous one.