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Luis Herrera Mesa,, Full Professor emeritus of Environmental Biology University of Navarra
To purpose of the next Summit on climate change
On November 30, the opening of the "Launching of the Climate Change Summit (COP21). The COP - the lecture of the Parties - is the highest decision-making body of the Convention. All States that are members of agreement are represented at the lecture of the Parties, which reviews the implementation of the legal instruments agreed by the COP, and takes the necessary decisions for promote the effective implementation of the agreements of the lecture.
reference letter The term global climate change refers to all changes in climate, including changes in temperature and the frequency and intensity of severe storms, altered rainfall cycles, changes in atmospheric and oceanic circulation, and the increasing melting of the Earth's ice caps. The United Nations Convention on Climate Change (UNFCCC), framework , defines climate change as "the change of climate attributed directly or indirectly to human activity that alters the composition of the global atmosphere and that is in addition to natural climate variability observed over comparable time periods". A distinction must therefore be made between climate change attributable to human activities, which alter atmospheric composition, and climate variability attributable to natural causes.
Warming in the climate system is unequivocal and, since the 1950s, many of the observed changes have been unprecedented in recent decades to millennia. The atmosphere and ocean have warmed, snow and ice volumes have decreased, sea levels have risen, and greenhouse gas concentrations have increased.
As for the atmosphere, each of the last three decades has been successively warmer at the Earth's surface than any previous decade since 1850. In the Northern Hemisphere, 1983-2012 is likely to have been the warmest 30-year period in the last 1,400 years. The globally averaged land and ocean surface temperature data show a warming during this new geological period called the Anthropocene coinciding with the onset of the industrial revolution since the mid-eighteenth century.
Global climate change may be one of the causes of major biodiversity loss. The impact of climate change on ecosystems and biodiversity translates into a set of phenomena that influence populations, inducing a shift of vegetation belts towards the poles and thus concomitant desertification processes. Some species persist under new conditions, others react by migrating and others disappear.
We hope that at the COP21 Paris Summit there will be agreement on a healthier, safer and more sustainable model energy based more on a circular Economics than on a linear Economics of buy, use and throw away.