Economic growth allows increasing numbers of people around the world to enjoy higher incomes and to escape poverty. Which of the following statements best describes the current limits to this growth?

a. Rising consumption due to higher incomes puts increasing pressure on the world's natural ecosystems and its ability to cope with further pollution and environmental degradation.

b. The supply of financial capital is insufficient to maintain this level of economic growth.

c. Innovation and technological change with respect to resource development have been exhausted.

d. Increasing prices of natural resources will limit further economic growth.

e. The inability of developing countries to increase their human capital will prevent further economic growth.