Coal the heat and pressure of deep burial causes the loss of water, methane and carbon dioxide and an increase in the proportion of carbon. Thus first lignite (also called "brown coal"), then sub-bituminous coal, bituminous coal, and lastly anthracite (also called "hard coal" or "black coal") may be formed. The wide, shallow seas of the Carboniferous Period provided ideal conditions for coal formation, although coal is known from most geological periods. The exception is the coal gap in the Permian–Triassic extinction event, where coal is rare. Coal is known from Precambrian strata, which predate land plants—this coal is presumed to
Carbon capture and storage (timeline) legislation to pave their path and as a vehicle to streamline funding. "The practical challenge we face...is what do we do about the problem, the challenge, of coal. There are practically no large carbon capture and storage projects under construction now," Mr Rudd said. "Australia in the last 12 months has decided to work with other major economies, and all the major energy companies, on the establishment of a Global Carbon Capture and Storage Institute. That is what we are here launching today." He said carbon capture and storage, which captures and seeks to inject it in safe stores deep