Environmental risks of economic development Revision Notes

Economic activities include agriculture, industrial production, mining, and urban development. While these activities drive economic growth and improve living standards, they often have unintended negative effects on the environment and human health.

For example, intensive farming can lead to soil degradation, while factories may emit pollutants into the air and water. Urban expansion often increases noise and visual pollution, affecting quality of life.

Understanding these impacts requires recognising the causal links between human actions and environmental changes. For instance, removing vegetation for farming exposes soil to erosion by wind and water, reducing fertility and causing sedimentation in rivers.

• Agriculture, industry, and urbanisation are key economic activities.
• These activities can degrade the environment and harm human health.
• Negative effects include soil erosion, pollution, and habitat loss.

Soil erosion occurs when the topsoil is removed faster than it can be naturally replaced, often due to deforestation, overgrazing, or poor agricultural practices. This reduces soil fertility and can lead to lower crop yields.

Desertification is the process by which fertile land becomes desert, typically in arid and semi-arid regions. It results from a combination of factors including drought, deforestation, and inappropriate land use.

For example, in parts of the Sahel region in Africa, overgrazing and drought have caused desertification, threatening food security and livelihoods.

• Soil erosion removes nutrient-rich topsoil, harming agriculture.
• Desertification transforms productive land into desert.
• Both processes reduce land productivity and increase vulnerability.

Economic activities contribute to various pollution types: water pollution from industrial waste and agricultural runoff; air pollution from vehicle emissions and factory smoke; noise pollution from urban traffic and machinery; and visual pollution from unsightly developments.

These pollutants can cause health problems such as respiratory diseases and contaminate water supplies.

Additionally, burning fossil fuels releases greenhouse gases like carbon dioxide, contributing to global warming and climate change. This leads to rising temperatures, altered weather patterns, and increased frequency of extreme events.

• Water, air, noise, and visual pollution arise from economic activities.
• Pollution harms human health and ecosystems.
• Greenhouse gas emissions drive global warming and climate change.

Sustainable development aims to meet present needs without compromising the ability of future generations to meet theirs. It involves balancing economic growth with environmental protection and social equity.

Resource management includes practices like crop rotation, controlled grazing, pollution control technologies, and renewable energy use to reduce environmental harm.

For example, adopting drip irrigation conserves water in agriculture, while regulations on emissions limit air pollution from factories. These approaches help conserve resources and maintain ecosystem services.

• Sustainable development balances growth and environmental care.
• Resource management reduces environmental damage.
• Techniques include efficient water use and pollution controls.

Consider a region experiencing rapid industrial growth and urban expansion, such as parts of Southeast Asia.

Economic development has increased manufacturing and infrastructure but also caused deforestation, air and water pollution, and increased waste.

For instance, river pollution from factories affects aquatic life and local communities relying on fishing. Urban sprawl leads to loss of farmland and green spaces, increasing flood risk due to reduced natural drainage areas.

• Rapid development can cause deforestation and pollution.
• Industrial waste contaminates water bodies.
• Urban growth reduces farmland and increases flood risk.