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 first emerged as a Symbolist influenced by the likes of Edvard Munch and Henri de Toulouse-Lautrec. This tendency shaped his so-called Blue Period, in which he depicted beggars, prostitutes, and various urban misfits, and also the brighter moods of his subsequent Rose Period.