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Where does water go after it rains?

What happens to rainfall in Australia? Water usually flows downhill, and because we know where the hills are, scientists have been able to divide the country into drainage divisions, or catchments. Find out which drainage division you're in, and learn what happens to rainwater that doesn't make it to the sea. |Learn more ...

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Catalyst: E-waste, recycling, and sustainability

What happens to electronic waste (e-waste)? Watch this clip about the physics of recycling to find out the way that useful materials are captured from waste at a local materials recovery facility. Presenter Tanya Ha investigates e-waste, the products it comes from, and the sustainability challenges it poses.

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Foreign Correspondent: Cenotes

The Yucatán Peninsula is located in south-eastern Mexico and covers a vast area of coastline south of the Gulf of Mexico. It is a popular tourist destination for people who travel to cities such as Cancún to enjoy sandy white beaches. Explore the subterranean freshwater caverns of this region and discover why this pristine ...

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ABC RN: Melbourne from a tram

Get ready to board a Melbourne tram for a journey around the City Circle route! Along the way, the passengers on the tram will highlight some aspects of Melbourne's urban design, both past and present, giving you a real sense of place. Is this the most 'liveable' city in Australia, as many claim, or a city in need of change?

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Catalyst: Planning future cities

Could your mobile phone help town planners design better cities? Data collected from our day-to-day interactions can now be collated and used to make our cities both more efficient and better places to live. See how it all works.

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Understanding the causes of climate change

Did you know that climate change is not a recent phenomenon? In the past, natural events led to changes in the climate. Although natural events still affect climate, they're not enough to explain the big changes we've been seeing in the last 150 years. What changes on earth can account for such dramatic changes to our climate? ...

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Battling erosion on the Gold Coast

Queensland's iconic Gold Coast beaches experienced severe erosion as a result of wild weather in early 2013. The liveability of beachside homes in the area is under threat. See the local council's attempts to shore up the coastline and hear some questions being asked about the best way to protect the landscape. Where does ...

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In My Blood It Runs: Connections to Country

First Nations communities have powerful connections with Country. These connections are reflected in spiritual narratives (sometimes referred to as Dreaming stories), which connect humans, animals, plants and minerals back to the creative spiritual forces who made the lands, seas and skies. Connections to Country form the ...

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This Day Tonight: A city without a heart?

Iconic but sterile. Nationally significant yet isolated. The city of Canberra regularly seems to divide opinion. Watch this clip and take an intriguing look at life in Canberra at the start of the 1970s. As you'll see, arguments about the liveability of Canberra are nothing new.

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The Traditional Owners of Perth: Whadjuk country

Ever wondered what life was like for the traditional owners of Perth before the British arrived in 1829? Whadjuk [pronounced wod-JUK] Noongar Elder and ambassador Dr Noel Nannup talks about traditional Whadjuk ways of life and key cultural places in Perth, and he teaches us the Noongar words for some Perth suburbs (such ...

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Walking on Aboriginal land

Benjamin Church works for the Royal Botanic Gardens Victoria. Watch as Ben welcomes visitors through the Welcome to Country ceremony. Why do people place leaves in the fire? What does that signify? As Ben takes his visitors through the Royal Botanic Gardens, he explains the importance of land to Aboriginal people.

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Foreign Correspondent: Cancun-style tourism

Tourism comes in many forms. Apart from being a holiday destination, Australia is also attracting business people and students. Find out how forecasts of future tourism numbers are made, particularly those from Asia. This clip also describes factors that threaten our tourism industry.

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Magical Land of Oz: Conserving the Great Australian Bight

What do you know of the Great Australian Bight? Learn about some of the unique wildlife that lives here. What makes it such a good habitat for these marine animals? What are some potential threats facing this pristine environment?

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Show me the water!

Where does the water in your tap come from? Fresh water accounts for only 3% of the earth's water supply and only 1% of that is available to us in lakes and rivers or in the atmosphere. But how much do we use for drinking water and what else do we use fresh water for? Watch this video to find out how NASA's Global Precipitation ...

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ABC 7.30: If you build it, they will come

It's been 'all systems go' in the Northern Territory, with a range of new development projects springing up. In this clip from 2013, see Territorians coming up with novel solutions to the age-old problem of housing. Could a shortage of affordable housing derail the good economic times?

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Food for thought

Food security, or sufficient access to safe and nutritious food, is of rising global concern. Watch this animated clip to discover the main problems facing food security, and to see some suggestions for solutions that might incorporate strategies like waste management practices and emerging technologies.

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Foreign Correspondent: Spawning dams, not fish, on the Mekong?

The Mekong is the largest freshwater fishery in the world; however, this may be about to change. Discover in this 2010 clip how migration of fish species along the lower Mekong may be impeded by the proposed construction of dams along this mighty river. Do the economic benefits of the dam outweigh the potential loss of ...

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Catalyst: Sustainable fish farming

There are already more people around the world who eat farmed fish than people who eat beef. With the world's population and demand for food increasing, why is it so important for us to farm sustainably? One fishery near Kakadu in the Northern Territory practises sustainable farming. Find out what makes this farm so sustainable.

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Catalyst: Would you eat insects?

A lot of resources go into the production of beef. For example, 20 litres of water is needed to produce just 1 gram of beef. In order to produce food more sustainably to feed an ever-growing population, some alternatives to protein have been suggested. What are some of these alternatives? Do you think they will ever replace meat?

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This place: Dreamtime story of the Nambucca River

Hear the Dreamtime story of the Nambucca River on Gumbaynggirr Country (North Coast of New South Wales). What is the river called in Gumbaynggirr? What made the imprint in the land around Nambucca River? There's a bend in the river called Baga Baga in Gumbaynggirr. Why is it called this?