What is the Paris Agreement and why does 1.5C matter?
In Paris in 2015, almost 200 countries signed a landmark agreement designed to limit global warming to 1.5C and avoid its worst impacts.
But despite some progress in areas like renewable energy, the world has continued to warm at a rapid pace.
A recent UN report said the target was likely to be breached in the next few years and that "urgent and stringent" action would be needed to return the world to 1.5C.
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