Why did Frank Borman turn down apollo 11?

Explanation: Borman further says that he was not interested in flying any mission after Apollo 11 because his primary motivation was flight testing rather than science. Borman never flew in space again after Apollo 8, his second mission. ... McDivitt never flew in space again after Apollo 9, his second mission

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.