The Intergovernmental Panel on Climate Change (IPCC) has just released a landmark report on the science of climate change.
Here is a summary of the key points from Environment Victoria

There is a lot of detail, but the core message is one of urgency. 2030 is the main game, not 2050.
It’s what we do now that will decide the kind of future we get.
We need to aim for stronger cuts in emissions now – aiming for 75% by 2030.