Carson's 1962 work Silent Spring was one of the first books ever to highlight environmentalist issues. Focusing on the negative, widespread, and long-lasting effects of human activity on the environment—particularly through the use of chemical pesticides in agriculture—Carson argued that we are all morally obliged to look after the environment. A huge best-seller, Silent Spring makes the case against man's short-termist interference in the natural world, and highlights the potential dangers for both humanity and wildlife. Carson is credited with bringing about the US ban on DDT, as well as other major changes in United States environmental law.