Hernández Díaz-Ambrona, Carlos Gregorio
La agricultura extremeña en el horizonte 2050: Cambio climático y cultivos.
"Agricultura", v. LXXIV
The climate used to model the life style and human activities over the history of the mankind. Transhumance or nomadism was a part of life of the population of Extremadura, Spain, as an adaptation response to the climate characterised by fresh and productive summers of mountain regions, and mild winters of southern valleys. The modern-day crop and animal husbandry practices mitigate the variability of the climate, whereas agricultural nomadism is a part of the past and not of the uncertain future. The United Nations published its last report at the 10th conference held in Buenos Aires, Argentina, on dangerous consequences and risks which an average temperature rise of 1.5-2°C may cause to the numerous regions of the planet, ecosystems and cultures. The question of the climate change as a fiction or a reality, possible climate change scenarios, an increase in CO2 emissions by industries and other sources, an increase in temperatures, changes in the pattern of rains and effects of the changes on crops are discussed. Possibilities of adapting agricultural practices to climate change, the global warming effect, the role of CO2, produced by combustion of carbon compounds, as the main gas responsible for the greenhouse effect, the phenomenon of the greenhouse gas effect and its mitigation, and projection of future climate and social, economic, technological and environmental implications are considered. It is concluded that climate change is not a fiction, but a fact confirmed by scientists.