National plans to cut carbon fall far short of what's needed to avert dangerous climate change, according to the UN Environment Programme.
Their Emissions Gap report says country pledges will fail to keep the global temperature under 1.5C this century.
The Unep analysis suggests the world is on course to warm around 2.7C with hugely destructive impacts.
But there is hope that, if long term net-zero goals are met, temperatures can be significantly reined in.