Humanity is falling further behind in the race against climate change. On Tuesday, the UN reported the first rise in CO2 emissions in four years.

To meet the goals of the Paris climate treaty, greenhouse gas emissions would have to hit their peak by 2020 – but experts say that this is unlikely to happen before 2030.

The report comes days before a high-level UN climate conference is to take place in Poland in December.

With only a single degree Celsius of warming so far, the world has seen a crescendo of deadly wildfires, flooding, heatwaves and hurricanes.

On current trends, temperatures are on track to rise roughly 4°C by the century's end, a scenario that would tear at the fabric of civilisation, scientists say.

To cap global warming at 2°C (3.6°F), national carbon-cutting pledges annexed to the 2015 Paris Agreement must collectively triple by 2030, according to the UN Environment Programme's (UNEP) Emissions Gap report.

To hold the rise in Earth's temperature to 1.5°C above the preindustrial benchmark, such efforts would have to increase fivefold.

"The emissions gap is much bigger than last year," UNEP's Philip Drost, one of several coordinators for the annual report's ninth edition, told AFP.

One obvious reason was a spike last year in the quantity of carbon dioxide, methane and other planet-warming gases escaping into the atmosphere.

This trend is set to continue in 2018, which saw a jump in CO2 emissions from the energy sector, according to the International Energy Agency, as well as an increase in the atmospheric concentration of CO2.

But the gap between where we are and where we need to be also grew on paper: New calculations by the UN's top science panel sharply reduce the real-world potential for drawing CO2 out of the air, whether by planting more trees or capturing and storing CO2 emitted by power plants.

'Like chasing a bus'

More broadly, the Intergovernmental Panel on Climate Change (IPCC) special report released last month concluded that 2°C of warming – once seen as a safety guardrail – would in fact usher in a maelstrom of deadly extreme weather.

Taken together, rising emissions and revised projections on CO2 removal have widened the emissions gap by 15 percent for a 2°C world, and by nearly 70 percent for the 1.5°C target, according to the new report.

The news comes despite breakneck growth in solar and wind power, gains in energy efficiency, and climate action by business and local governments, said Dr Andrew Steer, president and CEO of the Washington DC-based World Resources Institute.

Steer said that trying to catch up with climate goals was like “chasing a bus”.

"But the bus is accelerating even faster, and the gap is increasing," he said.

Momentum is most lacking at the national level, the report suggested.

"Governments really need to look at their Nationally Determined Contributions (NDCs) and increase their ambition," said Drost.

Boosting carbon-cutting efforts is high on the agenda at UN climate talks starting next week in Katowice, though host country Poland has let it be known that its top priority is finalising the "rulebook" for the Paris Agreement, which enters into force in 2020.

Carbon budget

But upping ambition will be a tall order given that most major economies are not even on track to achieve their current pledges.

The United States, the world's second largest carbon emitter, will miss its target badly, as will Australia, Canada, South Korea, Mexico and Turkey.

The European Union, Japan, Brazil and South Africa will also fall short. Top emitters China and Russia are both on track, but mostly because their goals were so modest to begin with.

The Emissions Gap report's projections are based on estimates of how much carbon humanity can emit into the atmosphere – known as the "carbon budget" – without breaching the 2°C or 1.5°C ceiling.

To cap global warming at 2°C, annual emissions in 2030 will need to stay under 40 billion tonnes of CO2 or its equivalent (GtCO2e).

In 2017, total greenhouse gas emissions hit 53.5 GtCO2e.

If the target is 1.5°C, the gap becomes a chasm: by 2030, carbon emissions must be lowered to no more than 24 billion tonnes per year, nearly one-and-a-half-times lower than they would be even if Paris promises are kept.

Written and reviewed by 100 climate scientists and experts, the annual, 100-page analysis tracks progress towards achieving the Paris treaty goals.

The EU's ambitious plan

EU climate commissioner Miguel Arias Cañete announced an ambitious plan for the European Union on Tuesday: To aim for net-zero greenhouse gas emissions by 2050. He will present the strategy at the UN conference in Katowice.

The bloc currently is set to reduce emissions by 45 percent by 2030 and 60 percent by 2050.

"The message of the Commission is: 'That's okay, but we need to do more," Arias Cañete said. "The thing is, do you want to be a front mover, or a follower?"

If the plan is approved, the EU may be treading a solitary path: The United States, another major economy and greenhouse gas producer, has abandoned its climate change goals. President Donald Trump has vowed to quit the Paris Agreement.

President Trump, who has publicly disavowed the scientifically proven existence of climate change, said on Monday that he did not believe a US government report that global warming would have devastating effects on the US economy.

(FRANCE 24 with AFP, REUTERS)