Eratosthenes was the first person to accurately estimate the size of Earth. He accomplished this feat by . Group of answer choices comparing the length of an Earth day with the distance between the Earth and the Sun observing shadows simultaneously cast at two different cities that were separated by a known distance measuring the severity of the greatest earthquakes sailing around the world and estimating his average rate of travel

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.