Quick questions on Environmental sustainability, market failure and climate change (HSC Economics Topic 3)

Ecologically sustainable development (ESD) is development that meets the needs of the present generation without compromising the ability of future generations to meet their own needs. It requires balancing three goals together, not trading one off completely against the others:

A market failure occurs when the free market, left to its own devices, fails to allocate resources efficiently, so the market outcome does not maximise society's welfare. Environmental problems are a textbook case because markets are very good at pricing private costs and benefits, but poor at pricing costs and benefits that fall on people who are not part of the transaction.

A negative externality of production exists when marginal social cost (MSC) exceeds marginal private cost (MPC):

Australia's National Greenhouse Gas Inventory shows a sustained decline over the past two decades, driven by electricity-sector decarbonisation and land-use change, though the pace has varied:

Climate change is the largest-scale example of a negative externality and is especially hard for markets to solve because of several compounding features:

Places a declining emissions baseline on Australia's largest industrial facilities; facilities that exceed their baseline must purchase and surrender Australian Carbon Credit Units (ACCUs), raising the effective marginal private cost of emitting toward the marginal social cost - a market-based (Pigovian-style) correction of the externality.

The Climate Change Act 2022 legislates a 43 percent reduction in emissions below 2005 levels by 2030, and net zero emissions by 2050.

Renewable electricity generation reached around 40 percent of the National Electricity Market by 2024 (Clean Energy Council/CSIRO GenCost, 2024 indicative), up from around 10 percent in 2010, supported by investment and subsidy mechanisms that lower the relative private cost of low-emission generation.

The New Vehicle Efficiency Standard (commencing 2025) sets a declining average emissions limit across each manufacturer's new vehicle sales, directly capping the externality-generating activity by quantity rather than price.

Write out MSC = MPC + external cost, and say which quantity (Qm or Qs) is which, before describing the deadweight loss - a stated formula anchors the whole answer.

Replace "Australia has climate policies" with "the Climate Change Act 2022 legislates a 43 percent cut below 2005 levels by 2030." A number with a year outscores a vague claim every time.