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Resource Depletion 1

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The document discusses the depletion of natural resources, distinguishing between renewable and non-renewable resources. It notes that non-renewable resources like coal, oil, and gas exist in limited quantities and will run out, while renewable resources like water and forests can replenish. However, even renewable resources are being consumed faster than they can replenish due to human activity. The document then focuses on why Brazil's Amazon rainforest is being cleared, listing cattle ranching, logging, construction of roads and buildings, and mining as the main causes.

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Managing economic development Resource depletion Why are some non-renewable resources being used up so rapidly?
Resource use The rate at which we consume natural resources is increasing Natural resources can be organised into two groups… Non-renewable – resources exist in limited supplies and cannot be replaced once they have been used. Non-renewable resources include coal, oil and natural gas. Renewable – resources will not run out so they can be used again and again. Renewable resources include wind, sun and water.
Why do we use non-renewable resources? Coal – the most-used fuel for generating electricity globally (37%) Oil – generates about 40% of world energy; 20 countries produce 95% of world oil Gas – natural gas is produced from most oil fields and is used for 16% of world electricity Reserve – a non-renewable resource, such as coal or oil, which exists in a finite quantity which can be exploited. Fossil Fuels – fuels formed through the fossilised remains of dead plants and animals
Are we depleting renewable resources? Forests – estimates suggest 40% of the Amazon rainforest has been consumed since 1960 and at present rate it could be used within 40 years. Water – MEDCs water huge quantities of water every day. Many LEDCs do not have access to clean water. Fertile soil – food production and agriculture is dependent on fertile soil. Soil in cleared Amazon areas rapidly loses its fertility.
Why is Brazil’s rainforest being cleared? Cattle ranching – large areas of the forest have been cleared for raising cattle, which can then be sold for their meat Logging – expensive wood such as mahogany is cut down by logging companies and exported across the world Roads and buildings – land in the forest needs to be cleared to make space for industrial buildings, accommodation for workers and for building roads. Mining – the Amazon has huge reserves of minerals such as gold, iron ore and copper. To get at these minerals, vast stretches LEDC

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Resource Depletion 1

  • 1. Managing economic development Resource depletion Why are some non-renewable resources being used up so rapidly?
  • 2. Resource use The rate at which we consume natural resources is increasing Natural resources can be organised into two groups… Non-renewable – resources exist in limited supplies and cannot be replaced once they have been used. Non-renewable resources include coal, oil and natural gas. Renewable – resources will not run out so they can be used again and again. Renewable resources include wind, sun and water.
  • 3. Why do we use non-renewable resources? Coal – the most-used fuel for generating electricity globally (37%) Oil – generates about 40% of world energy; 20 countries produce 95% of world oil Gas – natural gas is produced from most oil fields and is used for 16% of world electricity Reserve – a non-renewable resource, such as coal or oil, which exists in a finite quantity which can be exploited. Fossil Fuels – fuels formed through the fossilised remains of dead plants and animals
  • 4. Are we depleting renewable resources? Forests – estimates suggest 40% of the Amazon rainforest has been consumed since 1960 and at present rate it could be used within 40 years. Water – MEDCs water huge quantities of water every day. Many LEDCs do not have access to clean water. Fertile soil – food production and agriculture is dependent on fertile soil. Soil in cleared Amazon areas rapidly loses its fertility.
  • 5. Why is Brazil’s rainforest being cleared? Cattle ranching – large areas of the forest have been cleared for raising cattle, which can then be sold for their meat Logging – expensive wood such as mahogany is cut down by logging companies and exported across the world Roads and buildings – land in the forest needs to be cleared to make space for industrial buildings, accommodation for workers and for building roads. Mining – the Amazon has huge reserves of minerals such as gold, iron ore and copper. To get at these minerals, vast stretches LEDC