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Simpler route to global warming management being missed

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source: greenoptimistic.com
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A scientific report has stated that while the world is looking at carbon dioxide as the major concern with respect to climate change, other possibly easier ways of bringing down global warming are being missed out on.

The Arctic Monitoring and Assessment Programme (AMAP) set up by the Arctic Council produced the said report, which claimed that the temperature on earth could be brought down by earth by approximately 0.2 degrees Celsius between now and 2050 by putting down a heavier hand on the other pollutants except carbon dioxide, such as methane, black carbon and atmospheric ozone.

Methane is a greenhouse gas like carbon dioxide, but is 20 times more dangerous in its potential for global warming. However, it is much easier to deal with, as it is a short-lived pollutant. An even shorter life-span is carried by black carbon, which is produced from incomplete burning of fossil fuels.

The accumulation of greenhouse gases, which might even remain hanging in the atmosphere for over a century, is the main cause behind global warming.

“Actions to reduce methane emissions could slow the global warming expected by 2050 by approximately 0.2 degree Celsius. A reduction of about 0.25 degree Celsius in the Arctic could be achieved through global actions to reduce emissions of black carbon and co-emitted air pollutants,” the report, released during the Paris conference, says, according to a statement by the AMAP.

“Unlike carbon dioxide, short-lived climate pollutants (SLCPs) have a relatively short residence time in the atmosphere (of a few days to about a decade). The shorter the lifetime, the more quickly atmospheric concentrations can be reduced by lowering emissions. This means that action on SLCPs has the potential to slow the rate of climate warming on a comparatively shorter time scale,” said the statement.

The statement additionally said that this step should not be seen as a replacement to the actions being taken on carbon dioxide and harsher greenhouse gases.

“Action on black carbon and ozone has added benefits since these pollutants are also harmful to human health,” it said.

The research also showed that if black carbon and methane were aggressively curbed, the temperature rise since the industrial age could easily be stalled at the 2 degrees Celsius mark.

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World could see 140mn climate migrants by 2050: Report

World Bank Chief Executive Officer Kristalina Georgieva said the new research provides a wake-up call to countries and development institutions

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climate change is happening at a quickened pace and thus leading to melting of huge ice bergs
climate change is happening at a quickened pace and thus leading to melting of huge ice bergs
  • Three regions can witness migration due to climate change
  • The regions also include South Asia
  • It is important to take measures to control climate change

Three densely populated regions of the world, including South Asia, could see internal climate migrants of over 140 million people in the next three decades if climate change impacts continue, a new World Bank Group report finds.

The report, “Groundswell — Preparing for Internal Climate Migration”, released on Monday, finds that unless urgent climate and development action is taken globally and nationally, the three regions — Sub-Saharan Africa, South Asia and Latin America — together could be dealing with tens of millions of internal climate migrants by 2050.

World can witness migration of many due to climate change. VOA
World can witness migration of many due to climate change. VOA

These people will be forced to move from increasingly non-viable areas of their countries due to growing problems like water scarcity, crop failure, sea-level rise and storm surges.

The “climate migrants” would be an addition to the millions of people already moving within their countries for economic, social, political or other reasons, the report warns. The exodus could create a looming humanitarian crisis and will threaten the development process.

Also Read: Climate change driving dramatic rise in sea levels: NASA

However, with concerted actions — including global efforts to cut greenhouse gas emissions and robust development planning at the country level — this scenario could be dramatically reduced by up to 80 per cent or more than 100 million people.

The report is the first and most comprehensive study of its kind to focus on the nexus between slow-onset climate change impacts, internal migration patterns and, development in these three developing regions of the world.

World Bank Chief Executive Officer Kristalina Georgieva said the new research provides a wake-up call to countries and development institutions. “We have a small window now, before the effects of climate change deepen, to prepare the ground for this new reality,” Georgieva said.

It is important to control climate change now.

“Steps cities take to cope with the upward trend of arrivals from rural areas and to improve opportunities for education, training and jobs will pay long-term dividends. It’s also important to help people make good decisions about whether to stay where they are or move to new locations where they are less vulnerable.”

The research team, led by World Bank Lead Environmental Specialist Kanta Kumari Rigaud, include researchers and modellers from CIESIN Columbia University, CUNY Institute of Demographic Research, and the Potsdam Institute for Climate Impact Research.

Also Read: Maharashtra’s climate action plan yielded disappointments

They applied a multi-dimensional modelling approach to estimate the potential scale of internal climate migration across the three regions. They looked at three potential climate change and development scenarios, comparing the most “pessimistic” (high greenhouse gas emissions and unequal development paths), to “climate-friendly” and “more inclusive development” scenarios in which climate and national development action increases in line with the challenge. Across each scenario, they applied demographic, socio-economic and climate impact data at a 14 sq.km grid-cell level to model likely shifts in population within countries.

This approach identified major “hotspots” of climate in- and out-migration – areas from which people are expected to move and urban, peri-urban and rural areas to which people will try to move to build new lives and livelihoods. “Without the right planning and support, people migrating from rural areas into cities could be facing new and even more dangerous risks,” the report added. IANS