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.  .
This painting has attained an enormous reputation over the years, and has become an everlasting reminder of the devastation of war, in addition to becoming an anti-war icon. After it was completed, Guernica was exhibited worldwide during a limited tour, receiving wide acclaim and becoming quite famous.