[elihu]

Talking about terraforming is kind of off-topic, but I would note that the articles refer specifically to terraforming by increasing CO2 in the atmosphere, which has pros and cons. It would raise the temperature, but it wouldn't result in human-breathable atmosphere, if that was a goal.

Perhaps there aren't any better alternatives, but I'd think that orbital mirrors at least would be an option (like the soletta from Kim Stanley Robinson's Mars trilogy), though the scale of construction would be beyond anything that's been done before even if it were extremely thin. Placing a million square miles of mylar into space doesn't sound like an easy problem, though something much smaller and specifically focused at, say, the equator or specific sites might be more practical.