From here.Spend any time with Robert Bisson, and conversation will eventually turn to the tiny island of Tobago. Bisson loves the place, and with the enthusiasm of a travel agent raves of its friendly people, its pristine beaches, and its lush tropical rain forest. But the real source of his boosterism runs deeper, down to the bedrock that underlies the tourist haven. There, a few years ago, Bisson demonstrated a discovery that he claims has the potential to solve the looming global water crisis—which according to the UN could leave 2.7 billion people facing severe shortages by 2025—by bringing forth a steady flow of untapped freshwater from the geologic depths.
Not everyone agrees with his grandiose claims. Bisson is a controversial figure who has transferred his experience scouring the earth for oil and minerals to the field of hydrology. His unorthodox theories on the volume and dynamics of the world's freshwater supply go against the scientific current. Even so, Bisson has confounded his critics, who can't deny that he has an unnatural knack for finding water—hundreds of millions of gallons of it—in places where none was thought to exist.
Bisson's 37-page report to the UN (PDF) is quite interesting reading too...