Coal is a very clean source of energy. true or false

False

Coal is a good source of energy but not very clean

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.

examples of nucleic acids are deoxyribonucleic acid (dna) and ribonucleic acid (rna).