CHANGES IN ECOSYSTEMS

There are different types of changes in ecosystems

- Changes caused by natural causes: changes in the weather, floods, forest fires, volcanic eruption...

- Changes caused by human activities: construction of buildings, planting...

                             FLOOD

                          FOREST FIRE

            VOLCANIC  ERUPTION

THE WEATHER:  FOUR  SEASONS 

                               OF THE YEAR.

          HUMAN  BUILDINGS

                 HUMAN PLANTING