Zero emission? Carbon neutral? Carbon negative? What does it mean to achieve 'net-zero' emissions?
Because pledges alone won't achieve net zero.
It remains to be seen whether China's climate promise is genuine. But it puts pressure on many other nations – not least Australia – to follow.
'Carbon sinks' like forests and the soil have already been factored into the carbon budget – they should not be double-counted.
Households shouldn't have to do all the heavy lifting in the renewables transition. A new solar farm shows organisations and businesses how it's done.
Energy efficiency and electrification should lead the effort to decarbonise society, not hydrogen.
Net zero energy buildings produce at least as much energy as they use. Designing whole net zero campuses and communities takes the energy and climate benefits to a higher level.
The case for carbon pricing is not as ironclad as the case for climate action.
Britain's electricity supply is getting greener but the burning question remains over how to decarbonise heating.
After his landslide victory, Boris Johnson declared his ambition to make his country 'the cleanest, greenest on Earth'. Here's what he needs to do to prove it.
Wales is one small country with big carbon targets but that still needs the policies to deliver them.
Some of Australia's biggest property companies are making ambitious emissions-reduction pledges – but how well are they really doing?
Labour's next manifesto could be defined by a radical proposal for tackling climate change.
Guterres wanted world leaders to tackle subsidies for fossil fuels, implement taxes on carbon, and end new coal power beyond 2020. None of this happened.
At current rates of reduction, the UK's fair carbon budget will be spent in just four years' time.
Putting all of our eggs in the net zero basket is merely kicking the can down the road.
The Committee on Climate Change criticises slow progress, but has little to say about how to reconfigure government to make climate action a priority.
Academic research has awakened society to the scale of the climate emergency – now universities must lead the way on the solution.
The bold pronouncements of 2019 must mean something through the 2020s and beyond.
Contrary to the advice of the UK's climate advisers, aiming for net zero before 2050 is credible – but the country must reassess how much its future is worth.