To get to zero emissions, we’ll have to reform our energy sector away from fossil fuels.
To avoid dangerous climate change there is a finite amount of greenhouse gas emissions, in particular CO<sub>2</sub>, that we can add to the atmosphere - our global carbon budget. If we use our budget wisely, we have until about 2050 to transition to zero net emissions. But how do we get there?
Digging in: China’s UN climate pledge shows it is serious about doing the heavy lifting in going green.
China's formal climate target shows that the world's largest greenhouse emitter is determined to green its economy on an unprecedented scale - and that it can bring the rest of the world along for the ride.
Biomass will help meet Australia’s renewable energy target.
Burning some wood waste from native forests will be counted as renewable energy under revisions to the Renewable Energy Target (RET) passed this week.
Rwanda faces energy isues and renewable energy in rural parts of the country is vital for healthcare.
Rwanda requires the use of renewable energy to power up healthcare clinics in rural parts of the country.
Packing heat: concentrating sunlight into a reactor to split H2O and CO2 – a step toward making liquid fuels.
Courtesy of Professor David Hahn, University of Florida
Rooftop solar power is exploding in the US but some scientists are pursuing a radically different route in renewable energy: storing solar energy as a liquid fuel.
Wind energy will not cost Australians billions of dollars.
Wind energy is already competitive with fossil fuels, will reduce electricity prices for consumers, and will play a large role in reducing Australia's greenhouse gas emissions.
Could offshore wind be a solution to onshore wind’s problems?
One approach that would serve to sidestep the problems of wind farms on land (real or perceived) is to send the turbines offshore.
Diminishing returns: how long should experts be expected to search for health problems no one has proved are real?
EPA/Horacio Villalobos/AAP Image
"More research needed" is a familiar cry in science. But in the case of the Senate's call for yet more scrutiny of wind farms, there are signs that experts are being ushered in a preconceived direction.
Hepburn Wind in Victoria is Australia’s largest community renewable energy project.
Australia, like much of the rest of the world, is in the midst of an energy transition, driven by falling demand and uptake of renewables. Community energy is one way we can mange this transition to the benefit of all Australians.
Would you please tell me when my light turns green?
Tough Tory manifesto commitments and hatred of wind farms from the right will make it hard for the new government to meet its EU renewables commitments. Scotland might be able to help.
Lots of wind blowing – often at night when there’s little demand for power.
Smoothing out variable wind and solar is a growing problem. Instead of storing energy with batteries, utilities can adjust the power of millions of devices in buildings and homes.
South Australia’s wind farms have coped without baseload power before - they can do it again.
Coal closures announced this week in South Australia will cause employment pain, but could also help pave the way for the state to go 100% renewable - something that modelling suggests is eminently possible.
Since its launch in 2011, South Africa’s renewable energy programme has brought a diversity of new players and sources of investment to the country.
South Africa has won global recognition for its renewable energy programme, but will it succeed in balancing the demands of financial and commercial soundness, and the transformation agenda?
Russian President Vladimir Putin (right) is looking to provide his South African counterpart, Jacob Zuma, with nuclear energy.
Instead of spending time trying to make nuclear energy a possibility, South Africa should look to forms of renewable energy instead.
The G7 leaders are hoping to point the world towards a low-carbon transition.
EPA/Sven Hoppe/AAP Image
G7 leaders have pledged to help end the world's fossil fuel use by the end of the century. It's a laudable aim, but decarbonisation can and should be done by the middle, not the end, of this century.
What if jet fuel could be grown sustainably?
What if you could grow biofuels on land nobody wants, using just seawater and sunlight, and produce food at the same time?
It always seems impossible until it’s done.
There's no point promoting renewable technology if all the power still resides with fossil fuel firms.
A new Grattan Institute report suggests solar panels in Australia might be more trouble than they are worth.
The Grattan Institute has reported that the costs of solar panels have outweighed the benefits by almost A$10 billion in Australia. But the real benefits of cutting greenhouse emissions are much larger.
Wind farms in the pipeline could fill out Australia’s renewable energy target, leaving no room for other sources.
While Australia has reached a deal on the Renewable Energy Target, there's no long-term certainty for the sector yet.
Countries should make pledges to fund low-carbon research - such as developing solar technology - and development as part of global climate talks.
University of Salford Press Office/Flickr
Countries will take emissions reduction pledges to international climate talks in Paris at the end of this year. Those pledges should also include funds for low-carbon R&D.