Other existential risks include the decline of natural resources (particularly water), human population growth beyond the Earth’s carrying capacity, and nuclear weapons.
The ‘New Bradfield’ scheme seeks to revive a nation-building ethos supposedly stifled by bureaucratic inertia. But there are good reasons the scheme never became a reality.
Yes, Australia naturally cycles through dry and wet periods. But that doesn't mean we can simply build more dams and trust they'll be filled.
Having an envoy for drought and a prime minister keen to visit drought-affected areas puts the government under pressure to do the wrong thing.
Small solutions done properly can play a huge role in dealing with water scarcity.
The drought in Cape Town has taught the city some valuable lessons.
Day Zero will be the start of active water rationing when taps will be cut off and people will have to go to collection sites.
The water crisis in South Africa's Cape Town teaches us there's more at play than just rainfall. Disasters like droughts means the issue must be seen from many different perspectives, like politics.
Early warning signs of a pending drought are difficult to recognise but cities will have to be better prepared for prolonged changes in weather patterns, so that it can respond quickly.
Windhoek can teach Cape Town on dealing with drought. Technology alone is not enough.
Building resilience in Cape Town's water sector will require addressing risks like climate change, drought and flooding. Stormwater and groundwater are tipped as potential solutions.
Droughts are much bigger and slower than other natural disasters that hit Australia - meaning that despite their huge impacts, we still haven't figured out how best to protect ourselves.
Drought is a problem in South Africa and it affects farmers. As a result, farmers and government are working together to develop strategies.