In December 2009, representatives from nearly 200 countries gathered in Denmark to hammer out the most important carbon reduction agreement the world has ever made.
Council House Two, or CH2 as its known, is quite possibly the eco-office block of the future – many of its design principles have been taken from nature.
Are you Kyoto confused? Overwhelmed by global warming?
Is the air in our cities safe to breathe? New science about fine particle pollution has a dire warning for public health.
For many farmers, developing drought-resistant strains of wheat means the difference between surviving the next "Big Dry", or, leaving the land.
Mark Horstman reports on the extraordinary sex life of the Gouldian Finch, where choosing wrong mate can mean curtains for your kids.
Back in 2001, Australia was under threat from one of the world's most intractable invaders – the imported red fire ant.
A special edition of Catalyst investigates fire, flood and acid mud in the Murray Darling Basin.
Experts are warning that Australia is in the grip of the worst drought ever. Without rain, dams supplying our thirsty cities will run dry in just a few years – maybe sooner.
Surprisingly little is known about gold nuggets. How do they form, where do they come from and do they hold clues to finding more gold?
Studies from the Northern Hemisphere show that you can keep the cold out and the heat in by adding a green roof to a building. But in warmer climates vegetation can also cool a building down.
When it comes to water these days every drop counts. Australians have a higher water use per capita than any other country in the world.
Sex is a very complicated affair - at least it is to a lizard in a cold climate. It's long been known that for some reptiles the incubation temperature of their eggs can determine their gender.
Farmer and horse-breeder Peter Andrews has been described as everything from a crackpot to a visionary.
There's no doubt that one of Australia's greatest economic resources is mineral ores.
China is gearing up for the fastest deployment of nuclear energy in history, fuelled by Australian uranium. At least thirty new reactors are planned to be built in the fifteen years.
Catalyst's resident Palaeontologist, Dr Paul Willis, has been a fossil lover for as long as he can remember.
What would happen if the world were to start running out of oil?
You'd think after thousands of years perfecting the art of riding horses, everything there was to know about horses would already be known.
If you thought the pollution in our cities was bad, may be you should consider the air you're breathing indoors.