The first article defines climate change as changes in climate patterns attributed to increased greenhouse gases like carbon dioxide in the atmosphere. One scientist, Mark Lynes, warns that 3 degrees of warming could melt glaciers and dry out the Amazon rainforest. The second article describes climate change as a long-term shift in weather patterns over decades or longer. Scientists say global warming must be limited to 2 degrees Celsius to avoid irreversible damage. The third article discusses how novel food production strategies like cell-based foods could ensure future food security for Colombia as climate change impacts intensify. It also notes increased atmospheric CO2 levels since pre-industrial times.

1. ARTICULO 1
El Cambio Climático es, un cambio en el clima atribuido al aumento de los
Gases de Efecto Invernadero(GEI), principalmente el Dióxido de Carbono
(CO2) que alteraron la composición de la atmósfera mundial y que se suma a la
variabilidad natural del Clima observada durante largos períodos de tiempo
comparables.
El cambio climático es una de las mayores preocupaciones de los científicos,
uno de ellos es Mark Lynes que dice que con 3 grados más tendremos
desaparición de los glaciares de Groenlandia y de algunas islas bajas, que el
amazona se secaría, que el ártico en verano estaría libre de hielo, y además
menciona que las temperaturas “Extremas” serían las normales.
El término, a veces se refiere específicamente al cambio climático causado por
la actividad humana, a diferencia de aquellos causados por procesos naturales
de la Tierra y el Sistema Solar.
ARTICULO 2
El cambio climático es definido como un cambio estable y durable en la
distribución de los patrones de clima en periodos de tiempo que van desde
décadas hasta millones de años. Pudiera ser un cambio en las condiciones
climáticas promedio o la distribución de eventos en torno a ese promedio (por
ejemplo más o menos eventos climáticos extremos). El cambio climático puede
estar limitado a una región específica, como puede abarcar toda la superficie
terrestre.
Los científicos mundiales han determinado que el aumento de la temperatura
debiera de limitarse a 2ºC para evitar daños irreversibles al planeta y los
consiguientes efectos desastrosos en la sociedad humana. Para lograr evitar
este cambio irreversible y sus efectos, las emisiones de gases invernaderos
debieran de alcanzar su máximo en el 2015 y disminuir progresivamente
después de esa fecha hasta alcanzar una disminución del 50% para el año
2050.
ARTICLE 3
Climate change is a reality that demands novel strategies that allow us to
surpass the critical factors that put our existence in peril.The products based on
cell cultures and vegetabletissues could be excellent alternatives to produce
basic foods, assuring the food resource required in the future by Colombian
people.
There is more CO2 in the atmosphere, the carbon dioxide is the principal and
dominant taxpayer to the current climate change and his atmospheric
concentration has increased from a value of 278 parts for million in the age
preindustrial up to 393 ppm(parts for million) at present.

2. ARTICLE 4
The arcticserious one of the mas affected by the climate change.
A new investigation predicts that the increase of temperatures will drive to a
massive increase of the vegetable coverage in the Arctic. In an article published
on March 31 in Nature Climate Change, the scientists reveal new models who
project that the wooded areas in the Arctic might increase even in 50 per cent
during the near decades. The investigators also show that this problem will
accelerate the global warming to a major pace of the awaited thing.
The growth of the plants in the ecosystems of the Arctic has increased in the
last decades, a trend that coincides with the increase of the temperatures that it
comes to almost the double of the global rate.
The scientists developed models who predict statistically the types of plants that
can grow under certain temperatures and rainfalls. In spite of the fact that it
includes uncertainty, this type of shaped is an effective way of studying the
Arctic due to the fact that the hardness of the climate limits the variety of plants
that can grow, for what this system is simpler to shape in comparison with other
regions, as the tropics.
ARTICLE 5
To avoid the worst impact of the climate change we need a drastic and rapid
reduction of the emission of greenhouse gases. The energetic sector is the
major person in charge of the set of this emission, by this there is looked a
change of energetic model in which the sources of dirty energies are replaced
totally for renewable, saving and efficiency.
Colombia is especially vulnerable to the impacts of the climate change. Most of
his population is in the high parts of the mountain chains, zones where there are
foreseen problems of water shortage, and on his coasts, where the increase of
the level of the sea can impress the human accessions and economic key
activities for the country.
The climate change forces us to conceive the development of a different way
since to reduce his risks is necessary to do deep and systemic changes that
promote ways of life and of consumption more conscious that they happen for:
the of the economy or the promotion of a development of low intensity in the
consumption of carbon and a development more resilient that implies a more
harmonic relation between the human activities and the territory.

3. BIBLIOGRAFIA:
http://www.pnud.org.co/sitio.shtml?apc=--1--&s=g&m=a&cmd%5B333%5D=i-
333-3af48a226e7bb0eece38255cbc94a0e8#.UV6ofaI02d4
http://www.bogotahumana.gov.co/index.php/2012-01-04-20-46-15/2012-07-16-
16-44-18/cambio-cimatico
http://cambioclimaticoglobal.com/
http://www.lasallista.edu.co/fxcul/media/pdf/RevistaLimpia/vol2n2/PL_V2N2_71-
89-bioagricultura.pdf
http://www.greenpeace.org/espana/es/Trabajamos-en/Frenar-el-cambio-
climatico/
http://www.elmundo.es/traductor/