The only real downside to this version is having to overcome the various hurdles the controls sometimes present, but that's still a pretty considerable hurdle. (metacritic.com)
«It is more than a decade away when this would likely to have an impact; there are considerable hurdles to overcome technology-wise... the question is how quickly the technology is democratized in terms of price point,» he told CNBC. (cnbc.com)
Normally this requires an expensive base (the chemical opposite of an acid) that's reactive and unstable — considerable hurdles to eco-friendly mass production. (discovermagazine.com)