Many human geographers believe we are on the cusp of stage five in the _____. some believe we will experience a reemergence of o
ld and evolution of new infectious and parasitic diseases. others believe we will experience a 21st century medical revolution which will dramatically increase:
<span>Demographic Transition Model. This occurs when a population experiences a loss. The death rate surpasses the birth rate for the population. The economy is the force that causes this as less income means that families have less children.</span>
