in interviews with cnn, "superfreakonomics" author stephen dubner, and "scientific american", myhrvold has discussed ways to reverse some of the effects of global warming/climate change by using geoengineering. myhrvold and other inventors working with intellectual ventures have proposed several approaches, including one that would use hoses, suspended from helium balloons above the earth at high latitudes, to emit sulfur dioxide, which is known to scatter light. another approach would stimulate the formation and brightening of marine clouds to reflect more sunlight back into space.