Coal assay Coal assay Coal analysis techniques are specific analytical methods designed to measure the particular physical and chemical properties of coals. These methods are used primarily to determine the suitability of coal for coking, power generation or for iron ore smelting in the manufacture of steel. Coal comes in four main types or ranks: lignite or brown coal, bituminous coal or black coal, anthracite and graphite. Each type of coal has a certain set of physical parameters which are mostly controlled by moisture, volatile content (in terms of aliphatic or aromatic hydrocarbons) and carbon content. Moisture is an important property of
What the Health funded via an Indiegogo campaign in March 2016, raising more than $235,000. The film was released globally on Vimeo on March 16, 2017, and screenings licensed through Tugg Inc. The following doctors were featured in the film: A number of non-physicians were also interviewed: The documentary has drawn criticism from many, including scientific skeptics, who contend that it misrepresents facts: A companion book of the same name was released February 2017. It was authored by Eunice Wong, who is married to journalist Chris Hedges. What the Health What the Health is a 2017 documentary film which critiques the health impact