PROPOSED POLICY RESPONSES TO GLOBAL WARMING
There are different views over what the appropriate policy response to global
warming and climate change should be. These competing views weigh the
benefits of limiting emissions of greenhouse gases against the costs. In general, it seems likely that climate
change will impose greater damages and risks in poorer regions.
The main international treaty on climate change is the United
Nations Framework Convention on Climate Change (UNFCCC). In 2010, Parties to the UNFCCC agreed that
future global warming should be limited to below 2.0 °C (3.6 °F)
relative to the pre-industrial level. Analysis
suggests that meeting the 2 °C target would require annual global
emissions of greenhouse gases to
peak before the year 2020, and decline significantly thereafter, with emissions in 2050 reduced by
30-50% compared to 1990 levels. Analyses
by the United Nations Environment Programme and
International Energy Agency suggest
that current policies (as of 2013) are too weak to achieve the 2 °C
target.
The proposed policy responses to global warming and climate change are
mitigation, adaptation and climate engineering…
MITIGATION
Reducing
the amount of future climate change is called mitigation of climate
change. Climate change mitigation are
actions to limit the magnitude and/or rate of long-term climate change. Climate change mitigation generally involves
reductions in human (anthropogenic) emissions of greenhouse gases (GHGs). The
Intergovernmental Panel on Climate Change (IPCC) defines mitigation as
activities that reduce greenhouse gas (GHG) emissions, or enhance the capacity
of carbon sinks to absorb GHGs from the atmosphere. Studies indicate
substantial potential for future reductions in emissions by a combination of
emission-reducing activities such as energy conservation, increased energy
efficiency, and satisfying more of society's power demands with renewable
energy and nuclear energy sources. Climate mitigation also includes acts
to enhance natural sinks, such as reforestation.
Examples
of mitigation include switching to low-carbon energy sources, such as renewable and nuclear
energy, and expanding forests and other "sinks" to remove greater
amounts of carbon dioxide from
the atmosphere. Energy efficiency may also play a role, for example, through improving the
insulation of buildings.
ADAPTATION
Other policy responses include adaptation to climate change. Adaptation to climate change may be planned,
either in reaction to or anticipation of climate change, or spontaneous, therefore,
without government intervention. Planned adaptation is already occurring
on a limited basis. The barriers,
limits, and costs of future adaptation are not fully understood.
A concept related to adaptation is "adaptive capacity", which
is the ability of a system (human, natural or managed) to adjust to climate
change (including climate variability and extremes) to moderate potential
damages, to take advantage of opportunities, or to cope with consequences. Unmitigated
climate change (therefore, future climate change without efforts to limit
greenhouse gas emissions) would, in the long term, be likely to exceed the
capacity of natural, managed and human systems to adapt. Environmental organizations and public
figures have emphasized changes in the climate and the risks they entail, while
promoting adaptation to changes in infrastructural needs and emissions
reductions.
CLIMATE
ENGINEERING
Climate engineering (sometimes called by the more expansive term
'geoengineering'), is the deliberate modification of the climate. It has been
investigated as a possible response to global warming, therefore by the
National Aeronautics and Space Administration (NASA) and the Royal Society. Techniques under
research fall generally into the categories solar radiation management and
carbon dioxide removal, although various other schemes have been suggested. Research is at a generally early stage, with
no large-scale schemes currently deployed.
REFERENCES:
·
Climate Engineering (http://en.wikipedia.org/wiki/Climate_engineering)
·
Adaptation to Global Warming (http://en.wikipedia.org/wiki/Adaptation_to_global_warming)
·
Climate Change Mitigation (http://en.wikipedia.org/wiki/Climate_change_mitigation)
·
Global Warming (http://en.wikipedia.org/wiki/Global_warming)
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