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.  .
Picasso was commissioned to paint something for the 1937 World Fair, he delivered Guernica. It is an expression of pain, horror, anguish and disgust; what the artist felt afte â¦ r hearing the news of the terrible bombing of Guernica, a town in northern Spain, on April 26 1937 during the Spanish Civil War.n April 26, 1937 the defenseless little town of Guernica was bombed. This angered Picasso and he started to make lots of sketches, which led to the big painting of that name.