major development projects major developments major diameter major did major dietary major difference major differences major difficulties major difficulty major digital major dilemma major dimensions major diplomatic major directions major disadvantage major disadvantages major disagreements major disappointment major disaster major disasters major discoveries major discovery major discrepancies major disease major diseases major disruption major disruptions major distinction major distraction major distribution major distributor major distributors major disturbance major division major divisions major does major domestic major donor major donors major draw major drawback major drawbacks major driver major drivers major driving major driving force major drop major drought major drug major drug trafficker major duty major earthquake major earthquakes major east-west major ecological major economic major economic activities major economic activity major economic and social major economic impact major economic sectors major economies major economy major education major educational major effect major effects major effort major efforts major election major element major elements major embarrassment major emergencies major emergency major emerging major emphasis major employer major employers major employment major enemy major energy major energy source major engagement major engine major engineering major english major enterprise major environmental major environmental issues major environmental problems major epidemic major epidemics major equipment major error major errors major eruption major eruptions major ethical