Sydney has been labeled an "alpha city." what is an alpha city? a. a city that has the potential for becoming a capital city
b. a city that has a population over one million
c. a city that is an important hub in the global economic system
d. a city with an gross domestic product over that of neighboring cities

Which statements describe sustainable development? multiple answer choice -fishing does not remove more fish from water systems than can be replaced by the number of fish that will be born to replace them. -sustainable development is development that is designed to improve the economic conditions in less-developed countries. -sustainable development is mainly a regional issue. -sustainable development means water is used at a rate that won't reduce the amount available for future use. - sustainable development policies only need to be concerned with environmental protection. - trees cannot be cut down faster than the number that will be replaced by new growth.