1.Define the term ecosystem (2) 2a) State the role of the soil in an ecosystem (2) b) ldentify the components of an ecosystem (4) c) Name the biological in the soil and explain their role (4) 3a) Give any 3 green house gases and outline how they cause global warming (6) b) Describe the effects of global warming to the animal and plant life(8) 4a) State any 5 human activities and explain their threat to the ecosystem (10) b) Why should we conserve the ecosystem (6) c) What is being done by the Government to control the exploitation of ecosystem (8) Try to answer one by one