Throughout the 1970s and 1980s, ecologist Paul Ehrlich and economist Julian Simon were engaged in a heated debate regarding the future of the planet. Their respective positions can roughly be summed up by the following quotes:

Ehrlich: "Too many cars, too many factories, too much detergent, too much pesticides, multiplying contrails, inadequate sewage treatment plants, too little water, too much carbon dioxide - all can be traced easily to too many people."

Simon: "Adding more people causes problems. But people are also the means to solve these problems. The main fuel to speed the world's progress is our stock of knowledge; the brakes are our lack of imagination and unsound social regulations of these activities. The ultimate resource is peopleespecially skilled, spirited, and hopeful young people endowed with libertywho will exert their wills and imaginations for their own benefits, and so inevitably they will benefit the rest of us as well."

Evaluate each of their positions in the context of the Solow growth model.