Human activities can impose far-reaching effects on the environment
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Over the last two hundred years, the human population has grown exponentially. In the process of trying to satisfy the needs of these growing numbers, we have changed our planet; for example, millions of hectares of forests have been cleared to supply timber and land for homes and agriculture, deserts have grown, some rivers have dried up, and the air and oceans have been polluted. The Second World War reminded many countries of the importance maintaining self-sufficiency in basic foods, In the UK, between 1945 and the mid-1980s; the overriding aim of agricultural policy was to increase production. Food production is the oldest industry of all. Without a source of food and energy, there can be no life, and it is perhaps not surprising that humans have drastically altered the natural environment in order to grow more food. The nature of agriculture in the UK changed more during these 50...


