It's from last month - but author Tina Casey is both intelligently sceptical and optimistic. Article covers every old/new angle - and explains why new developments could finally lead to algae mass-market breakthrough.
(But she sadly/predictably "forgets" to mention crucial geopolitical advantages ie. bloody wars/invasions - oil,gas,pipeline dependency..economic consequences thereof..)
And fracking is anything but commercially intelligent or viable or earth-friendly or popular - yet they're still out there investing squillions and trying to flog it whatever the cost and failure rate.