Conventionally grown cotton uses more insecticides than any other single crop, a global spend of $2.6 billion each year. This is more than 10 per cent of the world's pesticides and nearly 25 per cent of the world's insecticides. Many of these are the most hazardous pesticides on the market including aldicarb, phorate, methamidophos and endosulfan. These pesticides can poison farm workers, drift into neighboring communities, contaminate ground and surface water and kill beneficial insects and soil micro-organisms.