ISLAMABAD: Concentrations of carbon dioxide will surge to a new high in the atmosphere this year, scientists have announced in the U.N. Climate Summit in New York City.
Global carbon dioxide emissions are projected to soar to 44 billion tons (40 billion metric tons) this year, a 2.5 percent increase from 2013 levels, according to joint studies published in the journals Nature Climate Change and Nature Geoscience.
The new estimates come from the Global Carbon Project, an international effort to track the global carbon cycle, from sky to sea, Live Science reported.
This week, leaders of 125 countries will meet in New York for the U.N. Climate Summit, which is intended to jump-start a global pact to cut greenhouse gases and slow down climate change.
The study authors warn that the world has 30 years to reverse the ominous trend before global warming surpasses the 3.6 degrees Fahrenheit (2 degrees Celsius) target set at a 2009 climate summit in Copenhagen.
“Globally, emissions would need sustained and unprecedented reductions of around 7 percent [each] year for a likely chance to stay within the quota,” study co-author Glen Peters, of the Center for International Climate and Environmental Research in Oslo, Norway, said in a statement.
”If carbon capture and storage technologies are not realized, it may not be possible to keep the temperature increase below 2 degrees Celsius.”
About 75 percent of carbon dioxide emissions come from burning fossil fuels such as oil and gas, and from making cement, the study reports.
In the atmosphere, carbon dioxide absorbs heat and raises temperatures on Earth. Because the gas lingers in the atmosphere for decades, even immediate and drastic cuts won’t lower its levels for decades.