Technogaianism (a portmanteau word combining "techno-" for technology and "gaian" for Gaia philosophy) is a bright green environmentalist stance of active support for the research, development and use of emerging and future technologies to help restore Earth's environment. Technogaianists argue that developing safe, clean, alternative technology should be an important goal of environmentalists. This point of view is different from the default position of radical environmentalists and a common opinion that all technology necessarily degrades the environment, and that environmental restoration can therefore occur only with reduced reliance on technology. Technogaianists argue that technology gets cleaner and more efficient with time. They would also point to such things as hydrogen fuel cells to demonstrate that developments do not have to come at the environment's expense. More directly, they argue that such things as nanotechnology and biotechnology can directly reverse environmental degradation. Molecular nanotechnology, for example, could convert garbage in landfills into useful materials and products, while biotechnology could lead to novel microbes that devour hazardous waste. While many environmentalists still contend that most technology is detrimental to the environment, technogaianists point out that it has been in humanity's best interests to exploit the environment mercilessly until fairly recently. This sort of behavior follows accurately to current understandings of evolutionary systems, in that when new factors (such as foreign species or mutant subspecies) are introduced into an ecosystem, they tend to maximize their own resource consumption until either, a) they reach an equilibrium beyond which they cannot continue unmitigated growth, or b) they become extinct. In these models, it is completely impossible for such a factor to totally destroy its host environment, though they may precipitate major ecological transformation before their ultimate eradication.