Solar - driven water splitting has been studied intensely for decades because it could provide a nearly limitless supply of clean - burning hydrogen if a suitable catalyst can be found. (cen.acs.org)
Again, it comes back to the basically limitless supply of online ad impressions. (canadianbusiness.com)
If proven safe, the proof - of - concept methods could also lead to a «limitless supply of blood» by using cells from universal donors, he added. (seeker.com)