What is the leading cause of china's increase in life expectancy from 1950-2005?

Hey, i was what is consisted in a sustainable city? like what unique designs they have, etc. for answering ; )

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.

Why was the democratic republic of the congo renamed "zaire"