Usually patient's with pica are missing a nutrient in their diet..blood testing is the usual method to discover what nutrients are missing.could also b due to a mental illness..
Animals and plants need to get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned. When humans burn fossil fuels to power factories, power plants, cars and trucks, most of the carbon quickly enters the atmosphere as carbon dioxide gas.
The type of mutation that does this is a point substitution mutation, more specifically A Nonsense mutation. It changes a codon coding for an amino acid to a codon coding for the signal to stop or terminate translation.
