by David Kennedy, Financial Post
Under an unassuming building on the edge of Toronto Island, a 30-centimetre steel pipe extends deep underground before jutting out into Lake Ontario. The pipe stretches nearly four kilometers to a series of unworldly fabric balloons packed full of compressed air.
An old marine salvage technology, the balloons, or airbags, have found a new function anchored under 70 meters of water.
http://business.financialpost.com/2015/01/30/how-one-company-plans-to-store-wind-energy-in-giant-balloons-under-lake-ontario/?__lsa=a252-7b1d#__federated=1