bubbles may protect coral reefs
New research suggests that blowing tiny bubbles through seawater may help protect coral reefs from increasingly acidic oceans by stripping dioxide (CO2) from the coastal marine environments and transferring it to the atmosphere. The technique used by Stanford scientists could provide a relatively inexpensive solution to this threat facing coral reefs today. It is estimated that 30 to 60 percent of all the coral reefs have died since the Industrial Revolution as the oceans absorbs more CO2 and become increasingly acidic.
more at earth.stanford.edu