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Human diseases considered environmental hazards because;Diseases may lead to death of humanDeclining productivityDiseases also increase expenditure of countries on medical care reducing resources for environmental issuesDisease increase food insecurity hence feminine.
Uses of soils include;Soils may contain valuable minerals e.g alluvial gold diamondsSoils such as clay are used in making ceramics such as pots and tiles.Soils are used in building and construction e.g clay for brick making and sand for constructionSoil provide physical support on which plants growIt's a medium through which plants absorb water and mineral elements
Disorders due to non-disjunction include;Down's syndromeKlinefelter's syndromeTurner's syndrome
Forms of Government include;Democratic governmentAristocratic governmentMonarchical governmentDictatorial government
Canals on the St Lawrence Seaway include;Welland canalSoo canalSault st.marie canalRudeau canal