Conservation is the safeguarding and preservation(1)...............natural resources, so that they can continue to e used and enjoyed. In the past, most people believed that the world's resources could never(2).................used up. Today, we know that is not true. An important part of conservation is the prevention of waste - waste of forest, soil, wild - life, minerals(3).............human lives. As important is the fight against pollution of our(4)..........., in particular, the dirtying and poisoning of air and water. Conservation is(5).........concerned with the reclaiming of land by irrigating deserts, draining swamps or pushing back the sea.
Conservation is the safeguarding and preservation(1)........of.......natural resources, so that they can continue to e used and enjoyed. In the past, most people believed that the world's resources could never(2)....be.............used up. Today, we know that is not true. An important part of conservation is the prevention of waste - waste of forest, soil, wild - life, minerals(3)......and......human lives. As important is the fight against pollution of our(4)...environment......., in particular, the dirtying and poisoning of air and water. Conservation is(5)..also.......concerned with the reclaiming of land by irrigating deserts, draining swamps or pushing back the sea.