It presented a model in which five variables : world population , industrialization , pollution , food production , and resources depletion , are examined , and considered to grow exponentially , .
The ability of technology to increase resources availability is only linear .
It presented a model in which five variables : world population , industrialization , pollution , food production , and resources depletion , are examined , and considered to grow exponentially , whereas the ability of technology to increase resources availability is only linear .