How do the characteristics in the Sahara, Sahel, savanna, and tropical rain forest impact trade and affect where people live? When answering this question, include one example from each region listed in the question to support your ideas about the trade and distribution of the population in these regions.

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.

i feel as if they would both catch on before to long because they would see them to frequent