Nine-volt battery batteries were formerly made in this size. They had higher capacity than the then-standard carbon-zinc types, a nominal voltage of 8.4 volts, and very stable voltage. Once used in photographic and measuring instruments or long-life applications, they are no longer manufactured as mercury is highly toxic and accumulates in the ecosystem, posing a risk to humans and wildlife. Most battery voltage testers and chargers that can also test nine-volt need another snap clip to hold the battery, while cylindrical batteries often share a holder that may be adjustable in size. Because of the proximity of the positive and negative terminals
Toxic colonialism Toxic colonialism Toxicomania colonialism, or toxic waste colonialism, refers to the practice of exporting hazardous waste from developed countries to underdeveloped ones for disposal. In 1992, 'toxic colonialism' was "a striking phrase coined by Jim Puckett of Greenpeace for the dumping of the industrial wastes of the West on territories of the Third World" The term refers to practices of developed nations who rid themselves of toxic or hazardous waste by shipping it to less developed areas of the world. The affected communities typically lack the resources, knowledge, political organization, or capital to resist the practice. In the US, the