Nairobi: G20 nations are collectively not on track to meet their Paris Agreement commitments, but they have huge opportunities to undertake rapid and deep cuts to greenhouse gas emissions, a new UN research has said.
An advance chapter of the 2019 Emissions Gap Report, released on Saturday ahead of the UN Secretary-General's Climate Action Summit slated to open on Monday, has said that the G20 members, which account for around 80 per cent of global greenhouse gas emissions, were not yet taking on transformative climate commitments at the necessary breadth and scale.
The report showed that around half of the G20 nations' GHG emissions trajectories fall short of achieving their Nationally Determined Contributions (NDC) under the 2015 Paris Climate Change Agreement.
Taken as a whole, the current NDCs are nowhere near enough to meet the 1.5 degrees Celsius or below two degrees temperature goals of the Paris Agreement.
This means that the world is still on the path to a catastrophic temperature rise of well over three degrees this century.
However, the advance chapter points to key areas where G20 nations can rapidly step up action when they submit their next round of NDCs in 2020.
"We can only avoid planet-altering climate change with the full commitment of G20 nations to a zero-carbon future. So far, they haven't done enough" said UNEP Executive Director Inger Andersen.
"But the good news is that every G20 nation has an array of nationally appropriate actions available to them to slash their emissions. Combined with strong political and societal support for climate action, there has never been a better opportunity for policymakers to take these actions."
The full Emissions Gap Report, due for release in late November, will contain a detailed G20 update.
The 2018 report said the G20 would need to cut an extra 2.5 gigatonnes of carbon dioxide equivalent per year by 2030 to meet their unconditional NDCs.
For conditional NDCs, the number is 3.5 gigatonnes.
According to the report, nations must at least triple the level of ambition of their current NDCs to have a chance of keeping global temperature rise under 2 degrees Celsius.
To keep global temperatures to 1.5 degrees, they must increase their ambitions five-fold.