Period 6 element devices though concerns about the element's toxicity have led to mercury thermometers and sphygmomanometers being largely phased out in clinical environments in favor of alcohol-filled, galinstan-filled, digital, or thermistor-based instruments. It remains in use in scientific research applications and in amalgam material for dental restoration. It is used in lighting: electricity passed through mercury vapor in a phosphor tube produces short-wave ultraviolet light which then causes the phosphor to fluoresce, making visible light. Thallium is a chemical element with the symbol Tl and atomic number 81. This soft gray other metal resembles tin but discolors when exposed to air. The
Toxic colonialism threatened by the highest levels of toxic chemicals and ensure that groups of individuals residing within those areas have opportunities and resources to participate in public discussions concerning siting and cleanup of industrial facilities. One organization that has had success in fighting toxic colonialism is the Basel Action Network (BAN). BAN is focused on confronting the global environmental injustice and economic inefficiency of toxic trade (toxic wastes, products and technologies) and its devastating impacts. 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,