10. HOW CAN WE COMBAT AND AVOID ENVIRONMENTAL POLLUTION?

11.HOW IS THE  DEGREE OF ENVIRONMENTAL POLLUTION MEASURED?

12.HOW CAN I START AN OIL RECYCLING PROGRAM IN MY COMMUNITY ?

RECUERDEN ES UN TRABAJO CON TODAS LAS NORMAS, PRESENTADO EN HOJAS DE BLOCK, MANUSCRITO. PARA EL LUNES 31 DE JULIO..