The report says that emissions have gone up by 1.5% per year in the last decade.
Christensen urged countries that had met their targets comfortably, such as Turkey and Russian Federation, to tighten them significantly.
How deep and how fast?
Chinese environmental experts have warned that the country's planned expansion of coal power projects risks hindering global efforts to fight climate change even as the nation remains on track to meet its own worldwide emissions pledges.
The latest report has concluded that many countries are not on track yet.
"When looking back at the 10 years we have prepared the Emissions Gap Report, it is very disturbing that in spite of the many warnings, global emissions have continued to increase and do not seem to be likely to peak anytime soon". "There has never been a more important time to listen to the science".
"[Greenhouse gas] emissions have grown every year since the global financial crisis in 2009, with only slightly lower growth in 2015 due to big declines in coal use in both the United States of America and China", the report observed.
To hit the more ambitious target of no more than 1.5 degrees of warming, they found, nations would need to ramp up their pledges fivefold.
All these countries need to revise their targets significantly in 2020 and then start actually meeting their targets to "close the emissions gap" and avoid a awful warming scenario.
Global efforts need to increase by "more than five fold over current levels" to meet the 1.5 degrees Celsius mark.
According to scientific models, that kind of temperature rise sharply increases the likelihood of extreme weather events, the accelerated melting of glaciers and swelling seas - all endangering the lives of billions of people.
World temperatures could spike more than twice the globally agreed warming limit, risking a climate disaster - after greenhouse gas emissions surged to a record level a year ago, according to a new United Nations report. Slowing future warming will require monumental changes, such as phasing out gas-powered cars, halting the construction of coal-fired power plants and overhauling how humans grow food and manage land.
In fact, many countries are headed in the wrong direction. However, some projections show that even if all of them are met the temperature would reach 3.2 degrees Celsius by 2100, exceeding by large the global warming aimed at the Paris Agreement. Every city, region, business and individual We need quick ways to reduce emissions as much as possible in 2020, then more determined contributions at the national level to kick-start major transformations in economies and societies. accumulated over the years of procrastination, "she added".
The Emissions Gap report, now in its tenth year, also details the cost of a decade of government inaction.
To date, he noted, discussions on whether and how to curb the production of fossil fuels have been nearly entirely absent from global climate talks.
(END OPTIONAL TRIM.) Diplomats are scheduled to gather in Madrid in December for the next round of negotiations over the rules of the Paris agreement.
"This is a new and stark reminder", Spain's minister for ecological transition, Teresa Ribera, said of the Emissions Gap Report in an email.
And despite the need for urgent action, with global energy demand set to continue rising for years, the United Nations itself conceded Tuesday that "there is no sign of (greenhouse) gas emissions peaking in the next few years".
"If you look at the global emissions, they are still going up", he told journalists at a briefing in Geneva.
At the current rate of emissions, even if commitments made under the Paris Climate Agreement are fulfilled, the world is on track to warm by 3.2 degrees Celsius by 2030.
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