L.A. Hard Hats (National Geographic Channel)

Each episode of L.A. HARD HATS focuses on a different group of workers as they build an eco-friendly 23-story building over the course of almost two years in Los Angeles, Calif. Each trade -- from the iron workers who install the rebar to the folks pouring the concrete to the plumbers, the electricians, and the glass installers -- are featured in their respective episodes, cameras rolling as they do their job from start to finish.

It is, without question, fascinating to see what goes into building a high-rise these days. While viewers don't get too much of a sense of who the workers themselves are, the work itself is incredible. But there are a couple of minor quibbles. On one hand, it's nice that the directors don't beat viewers over the head with the "green" thing. But since the whole point of this particular building is to be built as eco-friendly as possible, you'd think you'd hear more about it than the occasional reference (like mentioning that rebar is among the greener building materials, since it's made almost exclusively from recycled materials).

Also, there's a tendency to answer obvious questions -- like why concrete and rebar are being used instead of steel I-beams -- in tiny comments here and there, which leaves viewers hanging a little too often. But ultimately there's more here of interest than not, and it is kind of cool to know what goes into making a building happen.

TV Rating: TV-PG
Network: National Geographic Channel
Genre: Reality TV
Where to watch: National Geographic Channel