And don’t understand the extent of its impact.

Not understanding is the same as not knowing. I know that a car pollutes the environment but I don’t understand just how much. I don’t know the info.

You say you don’t think the issue is that people don’t know then immediately begin with “they don’t understand…”

What’s the difference?

Cool. Thanks

Would you be able to tell me briefly what it is (RSS feed) and where to get started? Or a link to a good article of that sort. I think I understand what it is, but I’m very much a newbie.