Environmental issues in Australia

Environmental issues in Australia describe many problems that affect the land and nature there. These problems are important to people who care about protecting Australia's environment. Some of these issues are linked to saving special places in Australia, while others can hurt farming and the country's money.

Human actions, like using resources, can change the land and its plants and animals. Many people in Australia, including Aboriginal communities, have deep ties to the land. When damage happens to special places for Aboriginal people, it can also hurt their culture and traditions.

Some of the biggest problems include climate change, pollution, harm to the ozone layer, protecting wildlife, invasive species that are not from Australia, land damage, problems with rivers and water, and issues from mining and building cities.

Climate change

Attribution, Public concerns and Emissions reduction

See also: Contribution to global warming by Australia

Australia is among the top ten countries in the world for releasing gases that warm the planet.

The country’s leaders agree that human activities are changing the climate. Some people strongly support protecting places from mining and stopping old power plants that burn coal, while others worry about new wind farms because of how they look and sound.

Even though important reports were shared, some people began to doubt these ideas after some private messages were shared online. But recent very hot weather and long dry periods have made leaders and many people pay more attention to these problems.

Energy use

See also: Coal in Australia

Most of Australia’s electricity comes from power plants that burn coal, because the country has lots of coal. Australia also does not make cars need to use less fuel, even though it promised to help reduce emissions under the Paris Agreement.

Contamination and pollution

Australia faces serious problems with contamination and pollution, including dirty soil and water, as well as polluted air. Experts believe there are between 16,000 and 80,000 places in the country affected by up to 7,500 different harmful substances. Some of these come from old government projects and industries.

Some major types of pollution in Australia include:

• plastics – Australia creates 2.5 million tonnes of plastic each year, and about 84% ends up in landfills. Around 130,000 tonnes of plastic waste escapes into the environment every year.
• hydrocarbons – more than 16,000 important locations affected
• herbicides and pesticides – over 3,500 important places found
• heavy metals – such as lead, arsenic, cadmium and mercury in many urban and remote areas
• radioactive elements in soils and radioactive waste – over 100 important sites, including areas that must be avoided because of high radiation from nuclear fallout
• per- and polyfluoroalkyl substances (PFAS) – more than 90 sites that need cleaning, especially where fire fighting foams were used
• asbestos – over 6.2 million tonnes in more than 50 major urban areas and some remote zones
• landfill leachate
• diesel exhaust and wood smoke that stays in the air for a long time in cities and remote places

Ozone depletion

Main article: Ozone depletion

Australia is one of the places most affected by damage to the ozone layer because of its location near Antarctica. This damage lets in more harmful sunlight, especially a type called ultraviolet radiation, which can hurt living things and plants. It also helps cause climate change and health problems.

The world agreed to stop using certain chemicals that damage the ozone, which has helped protect Australia from even worse sunlight. While the worst damage hasn't reached Australia yet, the ozone layer is thinner here, leading to more sunlight reaching the ground. Big bushfires in Australia can also add to this problem by creating a cycle that lets in even more sunlight.

Conservation

Main article: Conservation in Australia

Conservation in Australia is very important because the country has many different plants and animals, and many of them live only in Australia. Protecting these helps keep our world healthy for the future.

Australia has many forests, which cover about 17% of the land. These forests give us wood, medicine, and food. Some forests are protected to make sure they stay safe. One big challenge is keeping rainforests safe, especially places like the Daintree Rainforest in Queensland. People are working hard to protect these special areas from being damaged by things like logging and too many visitors.

Some animals in Australia are in danger of disappearing. This includes animals like the northern hairy-nosed wombat and the Tasmanian devil. Many animals have already disappeared over time, and it is important to help those that are left. The government and many groups are working together to protect these animals and their homes.

Main article: Threatened fauna of Australia

See also: Environmental threats to the Great Barrier Reef and Whaling in Australia

Invasive species

Main article: Invasive species in Australia

Australia's unique wildlife and natural habitats are often very sensitive to new animals and plants that humans bring in. Some of these introduced species, like the cane toad and rabbits, have caused big problems for native animals. These new species can take away food and space from native animals, or even hurt and kill them directly. For example, the cane toad is very poisonous and can harm many animals that try to eat it.

Australia has had to take special steps to protect its native species from these invaders. There are special fences and other measures to keep rabbits out of certain areas, and there are teams working to stop harmful animals like foxes from arriving in places like Tasmania. Controlling weeds is also important, and Australia has had some success in managing certain invasive plants.

Land degradation

According to Jared Diamond, one of the biggest problems for Australia is land degradation. Land degradation happens because of several harmful actions:

• Clearance of natural plants and trees
• Overgrazing by sheep
• Rabbits
• Running out of soil nutrients
• Soil erosion
• Man-made droughts
• Weeds
• Poor government decisions
• Salinisation

Logging and woodchipping

See also: Deforestation in Australia, Forestry in Australia, and Woodchipping in Australia

Cutting down big, old forests is still happening in parts of Australia, mainly in the eastern states like Tasmania, Victoria, and New South Wales. This often destroys natural homes of animals and plants and replaces them with farms that grow just one type of tree.

Australia had a 2018 Forest Landscape Integrity Index mean score of 7.22/10, ranking it 46th globally out of 172 countries.

Land clearing and soil salinity

Main articles: Land clearing in Australia and Salinity in Australia

Long ago, the Indigenous Australians used fire-stick farming to clear land, which changed the land over time. When Europeans arrived, they cleared even more land for farming, especially for cattle, cotton, and wheat. Since then, about 13% of Australia’s natural plants and trees have been removed. This has helped cause the disappearance of many animals and plants.

Clearing land also leads to problems like dryland salinity and soil erosion. These issues worry many people who work to protect Australia’s land. Soil salinity affects about 50,000 km² of Australia and is mostly because of land clearing.

Laws at different levels, from national to local, try to control how much land can be cleared. The rules can be different depending on where you are in Australia.

Waterway health

Taking care of Australia's waterways is very important for many reasons, including keeping animals and plants healthy and making sure people can use the water safely.

The Murray-Darling Basin faces challenges because of irrigation in Australia. This leads to too much salt in the water, which can hurt farming and wildlife in New South Wales, Victoria, and South Australia. These rivers also deal with pollution from pesticides and dry spells. In some years, especially in 2023, the warm water and low oxygen levels caused many fish to die in the Darling River.

Australian waterways facing environmental issues

Rivers and streams in cities also have problems, mainly because of pollution.

Victoria

• Port Phillip (contamination – silt; sediment; toxins; household chemicals; garden chemicals; E. coli; litter; flotsam and jetsam)
• Yarra River (contamination – E. coli; litter – 13 traps; logging; erosion; salinity)
• Maribyrnong River (contamination – arsenic and heavy metals; litter – 1 trap)
• Mullum Mullum Creek (contamination – E. coli; litter)
• Moonee Ponds Creek (contamination - predominantly plastic and polystrene; multiple traps)
• Murray River (salinity, erosion)

New South Wales

• Parramatta River (contamination – dioxins, arsenic, coal tars, chromium, lead and phthalates)^{[citation needed]}
• Darling River (salinity, erosion)^{[citation needed]}
• Murray River (salinity, erosion)^{[citation needed]}
• Cooks River (pollution, algal blooms)^{[citation needed]}

Queensland

• Bremer River (water grading F – lowest possible)
• Brisbane River
• Oxley Creek (water grading D)
• Bulimba Creek (threatened species due to land degradation; pollution; litter)

South Australia

• River Torrens (contaminants – E. coli; algal bloom)

Urbanisation

Australia is one of the world's most urban countries, with many cities spreading out over large areas. This spread, called urban sprawl, uses up land and creates problems. It puts extra demand on things like roads, electricity, and water. This can lead to pollution, more cars on the road, and even hotter temperatures in cities.

Urban sprawl keeps growing quickly, especially in big cities like Sydney and Melbourne. Some areas are getting so big that they might become huge cities in the future. Most of this growth comes from people moving to Australia rather than from families having more children. To try to slow down this spread, some cities have started plans to build more homes and services closer to public transport. There are also efforts to encourage people to live in smaller towns instead of big cities. However, these plans change over time based on local needs and lack of coordination between different government levels.

One big problem is that a lot of old electronic waste and dangerous chemicals end up in landfills. Australia does not have strict rules to stop harmful materials, like old TV parts, from leaking toxins into water. Because there aren't enough safe places to dispose of this waste, it is often moved between states or sent overseas.

Mining issues

See also: Mining in Australia

Australia has some of the biggest mining operations in the southern hemisphere and exports many resources that can harm the environment, such as coal and uranium.

Australia holds the largest amount of uranium in the world, and there have been many discussions about how to handle uranium mining. The anti-nuclear movement in Australia works to stop new nuclear power plants from being built.

See also: Uranium mining controversy in Kakadu National Park and List of Australian Inquiries into Uranium Mining

Controversial land use projects

This section lists development projects that caused debates because people worried about how they might harm the environment. These projects needed to share details about their possible environmental effects before they could go ahead.