Some economists have presented evidence that world economic growth is unlikely to be sharply limited in the near future by a shortage of nonrenewable resources. Explain this argument carefully, using economic terms as precisely as possible and presenting evidence in support of this argument. i. What is the primary factor that has allowed the world to avoid running up against a “limit to growth” from non-renewable resources? ii. Why might we imagine that this factor will continue to achieve the same effect in the future? iii. Indicate what factors might push in the opposite direction.