Scott seems to have a problem of scale in general. For example:
1) A million people to a city, cities seem to be several hundred miles apart given the distance between Tally's city and Diego, so a maximum of about a hundred cities. How can a hundred million people with matter reassemblers possibly pose a significant threat to the environment? Matter reassembly is several times more environmentally friendly than current production methods, and their population is about 5% of ours.
2) According to the map in Bogus to Bubbly, global warming is actually going to be about four times worse than what Al Gore predicted in An Inconvenient Truth, which is itself about eight times worse than the most pessimistic scenario ever endorsed by actual scientists, which is, in turn, about twice as bad as the UN investigation's predicted result if nothing is done (using numbers I researched when I first read Bogus to Bubbly, at least a year ago, data may have changed since).
3) The magnets in hoverboards are apparently strong enough to run off of only the trace metals found in riverbeds. The amount of energy needed to power magnets that strong is pretty immense, to the point where I'm pretty sure that solar cells with a 100% energy conversion rate (i.e. solar cells capable of violating the Law of Entropy) would still not be able to store more than an hour's worth of power for it.
But none of that really bothered me on the first read through, except perhaps the first one, because it was never integral to the plot. Hoverboards get a pass because they're cool and spending an extra four chapters explaining how they can work off trace metals or extremely distant metals wouldn't be any fun. The location of coastlines is never relevant to the plot anyway. The thing with the environment is most irksome in Extras, when Tally implies she's killed people over it, but it was just one line and not that hard to ignore.
