If you thought the pollution in our cities was bad, may be you should consider the air you're breathing indoors.
While solar power is clean and green, the great drawback for it has always been cost: it is more expensive than coal or gas-generated electricity. But could that finally be about to change?
There's been a lot of talk about a nuclear future for Australia. But we already have an enormous nuclear reactor providing us with massive quantities of energy – the sun.
Space is once again 'the new frontier' – this time in finding a solution to the Earth's energy woes.
For two decades, the CSIRO's Research Vessel, The Southern Surveyor, has been helping Australian scientists learn more about the oceans surrounding our island nation.
Catalyst's own surfing scientist, Ruben Meerman, heads to Queensland's Sunshine Coast to look at the science of the beach.
The Perfect Wave
In May 2007, the Mayor of London laid down a gauntlet: 60% cuts in carbon emissions by 2025 – that's 25 years ahead of the UK's national target – 25 years ahead of anywhere else in the world.
Imagine exploring our planet's last great frontier, diving into the inky mysteries of uncharted depths, finding treasures and strange new life forms.
Can we trust science to keep our water safe to drink? Drought, increasing populations and shifting rainfall patterns are placing ever greater demands on our water supplies.
In the green hills of South East Queensland, there's a Buddhist commune called Frogs Hollow. Curled amidst lush rainforest, peaceful streams and abundant wildlife, it seems tranquil enough.
Catholic Bishop Chris Toohey is acutely aware of climate change. His western NSW diocese of Wilcannia-Forbes is the size of France and in the grip of deep drought.
Fourteen billion years of evolution is being swayed by a thousand years of human excess.
'A thoughtful, surprising and really important film'
DAVID SUZUKI environmental guru, author, presenter of 'The Nature of Things'
On Christmas Eve 1974, Cyclone Tracy struck Darwin. It was the largest natural disaster in Australian History.
The story of the incredible struggle for survival of the land and marine iguanas; the dragons of the Galapagos Archipelago.
Across the world, coral reefs are turning into marine deserts. It's estimated that more than a quarter have been lost and that 40 per cent could be gone by 2010.
Australia is in the midst of a water crisis ... no longer is this a story of drought in the bush – it’s reached right into our city suburbs.
This episode focuses on the town of Marysville, 95 kilometres north of Melbourne. Thirty four men, women and children lost their lives in a fire that police now believe was deliberately lit.
The Liverpool Plains in northern New South Wales has been called the food-bowl of Australia, the nation's most fertile agricultural land.
While politicians clash noisily over global warming and how to fight it, millions of Australians are trying modestly to cut their energy use, to be a small part of a big solution.