B) Economic growth and negative externalities

The idea

Economic growth often conflicts with the objective of minimising negative externalities, creating a significant policy trade-off. As an economy expands, increased industrial production, transport, and consumption typically generate external costs such as air and water pollution, greenhouse gas emissions, and the rapid depletion of non-renewable resources. These negative externalities reduce overall social welfare and environmental sustainability. Governments face the challenge of implementing policies, such as carbon taxes or strict environmental regulations, to internalise these costs. However, such interventions can increase production costs for firms, potentially slowing down economic growth and reducing international competitiveness.

What earns the marks

• Identify that increased economic growth typically leads to higher levels of production and consumption, which generate negative externalities like pollution.
• Recognise that negative externalities cause a divergence between private costs and social costs, leading to market failure.
• Evaluate how government interventions to correct negative externalities, such as green taxes, might increase business costs and slow economic growth.
• Assess the concept of sustainable growth, where economic expansion is achieved without compromising future generations' ability to meet their needs.

Common mistakes and how to put them right

• Assuming economic growth always reduces negative externalities.

  Put it right: While wealthy countries can afford better technology, rapid growth usually increases resource depletion and pollution initially.

• Confusing negative externalities with private costs.

  Put it right: Negative externalities are third-party costs ignored by the price mechanism, not the direct costs paid by producers.

• Believing that government intervention always resolves the trade-off smoothly.

  Put it right: Interventions like taxation can lead to government failure or a loss of international competitiveness.

Exam tips

• When answering multiple-choice questions on this topic, look for the option that correctly identifies the third-party effect of increased production.
• Use the concept of social cost (private cost plus external cost) to explain why free markets overproduce goods that generate negative externalities during growth.
• Consider the long-term versus short-term impacts; short-term growth might cause pollution, but long-term growth could fund cleaner technologies.