I have some concerns with this plan. Bringing in massive amount of space ice will add to the planet's mass, has anyone calculated the effects of this on the earth's rotation and the length of the year? How do we ensure that this water is not resold, thus undercutting the market for new water? ... water flea markets ... water sales on e-bay ..... The proposed entry of space ice/water into the atmosphere will, as noted, create massive amounts of heat as the kinetic energy of the moving mass of water is converted to thermal energy and converts the ice to steam. This will result in a net addition to the global ecosphere of thermal energy, potentially increasing the pace of global warning, hastening the melting of the ice caps and creating a water surplus. Space water is a self-defeating plan. And, one more, how will we 'brand' our water so it's not confused with the low-grade sweat shop water imported by the big corporations?