Telomeres, a part of DNA that hold the key to biological aging.
Several companies are trying to develop life extension methods that could enable some people to live far longer. There are some ethical dilemmas.
Many are conflicted about whether the population should continue to grow and what the population of the future should look like.
Many people think a population policy is about control – like the one-child policy in China, for instance. But modern population policies are about population-well-being.
Ints Vikmanis / shutterstock
Too often, talk of population and sustainability becomes emotionally loaded and conflict ridden.
International tourists use many of Australia’s resources, including adding to fossil fuel consumption.
People think migrants are draining Australia's resources. But if we were to cut down on migration, it would also make sense to introduce policies that limit numbers of international tourists.
The bigger Melbourne gets, the more attractive it becomes.
In the 70s, Whitlam tried to build new, big cities. But this was too costly. Now the most viable solution for Australia's population woes is to make existing cities bigger.
Slums like this one in Rio de Janeiro embody the problems Paul Ehrlich warned of in ‘The Population Bomb.’
Fifty years ago biologist Paul Ehrlich published 'The Population Bomb,' an apocalyptic warning that overcrowding would lead to wars and famine. Here's what the book got right and wrong.
Artificial islands can cause huge environmental issues for coastlines.
The Forest City Project
Artificial islands that are now mushrooming across the ocean are regarded as 'engineering marvels'. But, little attention is paid to how these human-made structures affect sea life.
Understanding population density takes more than just arithmetic – that's where mapping can help reveal which countries and cities are really getting cramped.
Many people in culturally diverse populations in Western Sydney have lived in Australia for many years, if not several generations.
Reasoned debates on sustainable migration intake levels are important. But transport and health infrastructure shortfalls in Western Sydney won't be solved by reactive anti-immigration attitudes.
The great grey owl is imperiled by intensive logging of northern-hemisphere forests.
Copyright Ondrej Prosicky/Shutterstock.
The jury is in and the debate is over: Earth’s sixth great extinction has arrived.
Could this be the livestock feedstock of the future?
The black soldier fly, Hermetia illucens, could help solve global food shortages by feeding livestock. It can even be used to make diesel fuel.
The earth is a finite place.
Earth image from www.shutterstock.com
The global economy is already unsustainable – let alone if it gets bigger.
Humans used to keep up by simply burning more fuel or farming more land.
Clean water is one of many scarce resources that will be under pressure.
Humanity is on course for a population greater than 11 billion by the end of this century, according to the latest analysis from the UN’s population division. In a simple sense, population is the root…
The basic problem facing endangered species? Too many humans.
Each new human on the planet makes extinctions more likely, yet birth control still isn't seen as a big environmental issue.
Wheat ready for harvest in New South Wales. But how to increase production using the same areas of land?
Flickr/Tim J Keegan
The world's population is set to double by the end of the century. But there is only so much land available for food production.
India’s sterilisation programme focuses on women.
A sterilisation camp held in Chhattisgarh, an impoverished state in central India, has claimed the lives of 13 women, most of whom were young and marginalised. The women, who died within hours of the procedure…
By 2100 there could be 11 billion people on Earth, but there’s no quick way to slow growth.
The rise in population since 1900 has been so rapid that up to 14% of all humans that have ever lived are still alive today, according to recent research. Other research shows that slowing population growth…
Having two children could leave more carbon emissions than you can save by changing lightbulbs.
You’ve changed your lightbulbs, you recycle, you’ve retrofitted your house, cycle when you can, and drive an electric car when you can’t. You’re doing your bit to reduce your carbon emissions and prevent…
Demography is destiny. It’s an old idea but it remains as true as ever, despite the fact that it doesn’t get anything like the attention it deserves. It’s not hard to see why: not only is there a crowded…