Twenty-two dimensions of the population problem.
D000383:Agriculture; D002980:Climate; D003247:Conservation of Natural Resources; D003441:Crowding; D004467:Economics; D004522:Educational Status; D004777:Environment; D005398:Fisheries; D005523:Food Supply; D006296:Health Services; D006798:Housing; D006801:Humans; D011057:Politics; D011158:Population Growth; D014478:Unemployment; D014507:Urbanization; D014881:Water Supply