Summary: <p>In an effort to deal with the effects of global climate change, scientists and engineers are developing new technologies that aim to manipulate the weather and control the Earth's temperature. It sounds like science fiction, but the growing field of geoengineering aims to alter clouds, store carbon dioxide deep in the ocean and reduce the amount of sunlight reaching the planet. An Australian expert on global warming argues that these new technologies dramatically alter our relationship with the earth. In a new book, "Earthmasters," he says geoengineering could cause more harm than good.</p>
