Although the concept of sustainability is appealing, it is subject to two principal issues, ________ and ________.
A. the lack of private initiatives; high budget deficits
B. how to increase the current employment rate; the challenges of attracting foreign investments
C. how to think about population growth; the difficulty of predicting future technological progress and innovation
D. the slow growth of the renewable energy industry; the difficulty in curbing emissions of greenhouse gases in developing countries
Answer:C
Although the concept of sustainability is appealing, it is subject to two principal issues, ________ and ________.
A. the lack of private initiatives; high budget deficits B. how to increase the current employment rate; the challenges of attracting foreign investments C. how to think about population growth; the difficulty of predicting future technological progress and innovation D. the slow growth of the renewable energy industry; the difficulty in curbing emissions of greenhouse gases in developing countries