Billions of people are suffering from the effects of climate change and many of the impacts of the crisis are now simply "irreversible", a landmark report warns.
The UN’s Intergovernmental Panel on Climate Change (IPCC), is the most devastating official assessment so far of the effects of global warming on people and the planet.
It says that humans and nature are being pushed beyond their abilities to adapt, with over 40% of the world's population are "highly vulnerable" to climate, the sombre study finds.
