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.  .
'Guernica' is a very large painting, measuring 3.5 metres in height and 7.8 metres in width. The painting is painted in oil and in monochrome colours of black, grey and white. The picture is full of symbols yet its overall theme is one of suffering.