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.  .
'No, painting is not made to decorate apartments. its an offensive and defensive weapon against the enemy.'. Like the drawing, Guernica is also full of hidden images and themes, consequently, almost every line and shape in it is meaningful, either in the context of what it represents or what it is concealing. The themes of death, the bullfight and the crucifixion are common to both pictures.