NANOWEAPONRY: THE NEWARMS RACE - Nanofactories make the manufacture of many kinds of weapons possible with incredibly accurate computerized systems. While older technologies were both difficult and costly, nanoweapons could be manufactured easily and quickly. Conventional style weapons made more powerful and new weapons such as poison-carrying nanorobots could be made by the billions nearly cost-free and delivered remotely. Once inhaled, they might even be tailor-made to kill only people with specific genetic signatures, thus used as a means for ethnic cleansing. An arms race could trigger reckless development and testing of new weapons with unpredictable results. Experts agree this is probably the #1 potential danger of molecular nanotechnology. ENVIRONMENTAL IMPACT AND EXISTENTIAL DANGERS - The use of nanofactories to make countless cheap, durable products could lead to 'disposable thinking' where products are created en mass and discarded in abundance, overwhelming recycling needs and the environment. Poor nations might use biomass (carbon-rich trees) as fuel for nanofactories, leading to increased deforestation. Experimentation in nano-augmentation of plants and animals (for example, to make them larger, smaller, faster, stronger, etcetera) could easily lead to runaway consequences in the wild ("green goo" vs "gray goo") that could threaten existing plants and animals, affect the food chain, and pose unforeseen threats to human life. This is a prime concern. Ecophage ...