What are the four primary elements found in coal? 90% carbon, 3% oxygen, 4% hydrogen, and 1% sulfur. What forms of air pollution do these elements become as part of coal combustion? When coal is burned for fuel, it combines with oxygen in air to form several air pollutions. What substances are contained within coal ash?
It is an oil painting on canvas.   It is to show Picasso's anger at the bombing of the little Spanish town Guernica in 1937.  .
In 1936 54-year old Picasso met Yugoslavian Dora Maar (1907 -1997), the photographer who documented Picasso's painting of Guernica, the 1937 painting of Picasso's depiction of the German's having bombed the Basque city of Guernica, Spain during the Spanish Civil War.