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Climate change – Analysis and Comment

As both a word and an idea, ‘medieval’ carries centuries of connotation of a murky and brutal pre-scientific age. US Fish & Wildlife Service/Swanson Scott

So hot right now: the Middle Ages in the climate change debate

“Medieval” has become the accusation du jour in Australian domestic politics, used with equal conviction across the spectrum to discredit opponents’ views. One debate where this accusation has taken centre…
Extreme weather is more common than ever. EPA

How does the IPCC know climate change is happening?

Climate change is one of the few scientific theories that makes us examine the whole basis of modern society. It is a challenge that has politicians arguing, sets nations against each other, queries individual…
The IPCC’s latest report sets the record straight on science (again), but could be stronger on the economic case for climate action. EPA/Niels Ahlmann Olesen/AAP

New IPCC report: busting myths, both scientific and economic

The headline statements of the Intergovernmental Panel on Climate Change’s new Synthesis Report – unequivocal climate change, almost certainly driven largely by humans, and an urgent need to cut emissions…
The Earth is finite - so are there limits to growth? NASA's Marshall Space Flight Center/Flickr

Why uncontrolled climate change may be an ultimate limit to growth

“But who do you think’s right, Prof? The optimists or the pessimists?” At the end of my sustainability economics course in 2007, students were challenging me to end 20 years of professional fence-sitting…
It’s all in the atmosphere. David Gray/Reuters

What caused the ‘pause’ in global warming?

Many people around the world, in certain locations, have asked, “where is global warming?” This is because they have experienced very cold wintry conditions and weird weather that they do not associate…
Apollo Bay in Victoria. Australia’s coastal towns are vulnerable to changes in the surrounding seas. ccdoh1/Flickr

Your coastal town’s climate score? There’s a website for that

Australia’s coastal towns, many built around fisheries and tourism, are particularly vulnerable to climate change. South east and south west Australia are marine hotspots — they are warming much faster…
When it gets hot in the city, where’s the best place to go? Alpha/Flickr

Smart urban design could save lives in future heatwaves

Heatwaves — Australia’s biggest natural killers — are getting more frequent and hotter thanks to climate change. One day cities such as Melbourne may see unprecedented heat, perhaps 48C or higher. But…
Starting earlier, lasting longer: the challenge of managing the New South Wales bushfire season is getting harder. AAP Image/Dan Himbrechts

Bushfire season in New South Wales grows longer and stronger

In New South Wales in 2013, bushfires in January and October collectively burned 768,000 hectares of bushland and destroyed 279 homes. Tragically, two people lost their lives and the damage was estimated…
Enjoy the color while you can before climate change makes a mess of this too. chensiyuan

Fall foliage in the crosshairs of climate change

One of nature’s most spectacular events occurs every autumn, when the leaves of hardwood trees burst into brilliant color before falling to the ground. These autumnal displays in the eastern United States…
Opening a mine in Queensland this week, Prime Minister Tony Abbott said coal was “good for humanity”. Dan Peled/AAP

Abbott’s G20 agenda: climate still the elephant in the room

News emerging from Washington last week suggests climate change may amount to more than an FAQ in the appendices of this November’s G20 leaders’ summit agenda. President Obama’s deputy national security…
Science can’t tell us exactly when the rising oceans will swallow up the Maldives, but it can give us a good idea. Hiroyuki-H

Why climate ‘uncertainty’ is no excuse for doing nothing

Former environment minister Owen Paterson has called for the UK to scrap its climate change targets. In a speech to the Global Warming Policy Foundation, he cited “considerable uncertainty” over the impact…
Could carbon capture and storage be the way to clean up coal power stations, such as this one in Australia’s Latrobe Valley? Monash University/Flickr

Carbon capture and storage — reality or still a dream?

To have any chance of avoiding dangerous climate change we’ll have to reduce the carbon emissions from our energy sectors — currently the largest human source of greenhouse gas emissions globally. And…
Better get our heads out of the sand and run. Peter Byrne/PA

Fracking boom could mean up to 12% more carbon emissions

The consistent message from those who would seek to exploit shale gas is that it has three distinct advantages over existing forms of fossil fuel energy: it is cheap, it has a lower influence on global…
A new study shows plants may absorb more carbon than we thought. Jason Samfield/Flickr

Plants absorb more CO2 than we thought, but …

Through burning fossil fuels, humans are rapidly driving up levels of carbon dioxide in the atmosphere, which in turn is raising global temperatures. But not all the CO2 released from burning coal, oil…
Australia’s Commonwealth marine parks were designed to protect marine life, including important foraging areas for sea birds.

Marine park review looks set to repeat past mistakes

In June 2012 the Labor government announced the “world’s largest” system of marine parks, adding 2.3 million square kilometres and taking the overall size of Australia’s Commonwealth marine reserves to…
A king tide in New Zealand, part of a project documenting what future sea level rise might look like. Witness King Tides/Flickr

15 years from now, our impact on regional sea level will be clear

Human activity is driving sea levels higher. Australia’s seas are likely to rise by around 70 centimetres by 2100 if nothing is done to combat climate change. But 2100 can seem a long way off. At the moment…
Having two children could leave more carbon emissions than you can save by changing lightbulbs. p.Gordon/Flickr

How family planning could be part of the answer to climate change

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…
Shark Bay is one of Australia’s 19 World Heritage Areas, home to dolphins, dugongs, and sharks. Matthew Fraser

Climate change threatens Western Australia’s iconic Shark Bay

In the summer of 2010-2011 Western Australia experienced an unprecedented heatwave — but not on land. Between December 2010 and April 2011, sea temperatures off the WA coast reached 3C above average, and…
In 2012 and 2013 parts of New Zealand suffered the worst drought in 70 years. Dave Young/Flickr

New Zealand is drying out, and here’s why

Over 2012 and 2013, parts of New Zealand experienced their worst drought in nearly 70 years. Drought is the costliest climate extreme in New Zealand; the 2012-2013 event depressed the country’s GDP by…
Conspiracy theories are so hard to debunk because they use science. Flickr/dexterd

The ironclad logic of conspiracy theories and how to break it

As the United Nations warns of the dire consequences of global warming, the commitment of the current Australian government to the reality of climate change remains unclear, with a history of disturbingly…
The need for caution when any anomaly is revealed in new research. Flickr/Adam Gerard

How myths and tabloids feed on anomalies in science

UNDERSTANDING RESEARCH: What do we actually mean by research and how does it help inform our understanding of things? What if research throws up a result that calls for a new way of thinking? How do we…