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   ENDANGERED ECOSYSTEM 9.1 : HUMAN ACTIVITIES THAT ENDANGER AN ECOSYSTEM Nurul NazihahNur AfiqahNor Syafiqah  Human activities which threaten the ecosystem:  ~development and industrialisation. ~increase in the number of motor vehicles. ~increase the usage of pesticides and chemical fertilisers in the agriculture sector. ~uncontrolled deforestation.   The impact of human activities on the ecosystem:  ~soil erosion. ~flash flood. ~landslide. ~eutrophication. ~water,air,thermal and noise pollution. ~global warming. ~depletion or thinning of the ozone layer. ~climatic change. ~extinction of living things.    POLLUTION   (undesirable change in the physical chemical or unbiological characteristic of the natural environment,brought about by human activities !ir  ollution#ater ollutionThermal ollution $oise ollution
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