scholarly journals Población, cambio climático y huella ambiental // Population, Climate Change and Environmental Footprint

Author(s):  
Manuel Peinado Lorca

Resumen       En 1679 Anthony van Leeuwenhoek fue el primero en especular acerca del número de seres humanos que podría albergar la Tierra. Desde entonces y, sobre todo, desde que Thomas Malthus publicó en 1798 su célebre ensayo, el debate demográfico –particularmente exacerbado en la segunda mitad del siglo pasado, cuando la tasa de crecimiento poblacional duplicaba a la actual- se estableció en dos frentes, el de los boomsters, que sostienen que no hay límites para la explotación de los recursos terrestres, y el de los doomsters, para los que los recursos del planeta tienen unos límites que estamos a punto de desbordar. La detección en la década de 1990 de los primeros síntomas del calentamiento global ha marginado a unos y otros. Hoy, el debate no se centra en los límites de los recursos, sino en los excesos de emisiones de gases de efecto invernadero con los que nuestro sistema económico consumista está alterando el equilibrio global de la Tierra. La superpoblación sigue siendo el problema, pero la unidad de medida de hoy es nuestra huella ambiental evaluada en términos de producción de gases de efecto invernadero, los responsables de la aceleración del cambio climático global. Abstract       In 1679 Anthony van Leeuwenhoek was the first person speculating about the number of human beings that the Earth could harbour. Since then and, above all, since Thomas Malthus published his famous essay in 1798, the demographic debate—especially exacerbated in the second half of the last century, when the population growth rate doubled the current one—was established on two fronts, that of boomsters, who argue that there are no limits to the exploitation of the Erath resources; and that of doomsters, for whom the Earth resources have a limit that we are about to overflow. The detection in the 1990s of the first symptoms of global warming has marginalised ones and the others. Nowadays, the debate is not focused on the limits of resources, but on the excessive emissions of greenhouse gases with which our consumer economic system is altering the global balance of the Earth. Overpopulation is still the problem, but the current unit of measure is our environmental footprint assessed in terms of the production of greenhouse gases, which are responsible for the global climate change.

2022 ◽  
pp. 723-747
Author(s):  
Richard W. Beach ◽  
Blaine E. Smith

Grounded in research-based examples, this chapter provides a resource for students, teachers, and researchers to critically engage with issues of climate change through leveraging the affordances of digital tools. In particular, the authors discuss the affordances and challenges of students using digital tools to address climate change. They also review research in this field, including studies on visualizations, analyzing information, social media, digital videos, digital role-play, video games, and virtual and augmented reality. The chapter describes how digital tools offer meaning-making possibilities for students to propose solutions to climate change through engaging multimodal narratives, as well as share their voices through digital activism. Considering that global climate change is perhaps the most serious problem human beings have ever faced, this chapter offers implications for curriculum and instruction to aid educators with designing digital projects for students to understand climate change and find ways to take a stand.


Author(s):  
Michael H. Fox

We, the teeming billions of people on earth, are changing the earth’s climate at an unprecedented rate because we are spewing out greenhouse gases and are heading to a disaster, say most climate scientists. Not so, say the skeptics. We are just experiencing normal variations in earth’s climate and we should all take a big breath, settle down, and worry about something else. Which is it? A national debate has raged for the last several decades about whether anthropogenic (man-made) sources of carbon dioxide (CO2 ) and other so-called “greenhouse gases“ (primarily methane and nitrous oxide) are causing the world to heat up. This phenomenon is usually called “global warming,” but it is more appropriate to call it “global climate change,” since it is not simply an increase in global temperatures but rather more complex changes to the overall climate. Al Gore is a prominent spokesman for the theory that humans are causing an increase in greenhouse gases leading to global climate change. His movie and book, An Inconvenient Truth, gave the message widespread awareness and resulted in a Nobel Peace Prize for him in 2008. However, the message also led to widespread criticism. On the one hand are a few scientists and a large segment of the general American public who believe that there is no connection between increased CO2 in the atmosphere and global climate change, or if there is, it is too expensive to do anything about it, anyway. On the other hand is an overwhelming consensus of climate scientists who have produced enormous numbers of research papers demonstrating that increased CO2 is changing the earth’s climate. The scientific consensus is expressed most clearly in the Fourth Assessment Report in 2007 by the United Nations–sponsored Intergovernmental Panel on Climate Change (IPCC), the fourth in a series of reports since 1990. The IPCC began as a group of scientists meeting in Geneva in November 1988 to discuss global climate issues under the auspices of the World Meteorological Organization and the United Nations Environment Program.


2011 ◽  
Vol 243-249 ◽  
pp. 5289-5292
Author(s):  
Jun Hua Yu

As known to all, the emission of greenhouse gases is mainly caused by human activities. If we could cut down the emission, we could gradually prevent the influence of climate change. Relevant research shows that in the field of energy consumption, the control of CO2 emission is the most effective way to save energy. Thus, reducing the architectural energy consumption is one of the most crucial factors to realize global climate goals. Although more and more scholars prefer to use the word ‘dilemma’ to describe the urgent contradiction between architectural construction and environment, and energy as well, I still want to discuss the influence of global warming on the architecture industry, and explain why it is an opportunity as well.


2021 ◽  
Vol 46 (1) ◽  
pp. 1-33
Author(s):  
Erle C. Ellis

Human use of land has been transforming Earth's ecology for millennia. From hunting and foraging to burning the land to farming to industrial agriculture, increasingly intensive human use of land has reshaped global patterns of biodiversity, ecosystems, landscapes, and climate. This review examines recent evidence from archaeology, paleoecology, environmental history, and model-based reconstructions that reveal a planet largely transformed by land use over more than 10,000 years. Although land use has always sustained human societies, its ecological consequences are diverse and sometimes opposing, both degrading and enriching soils, shrinking wild habitats and shaping novel ones, causing extinctions of some species while propagating and domesticating others, and both emitting and absorbing the greenhouse gases that cause global climate change. By transforming Earth's ecology, land use has literally paved the way for the Anthropocene. Now, a better future depends on land use strategies that can effectively sustain people together with the rest of terrestrial nature on Earth's limited land.


2013 ◽  
Vol 1 (3) ◽  
pp. 104-121
Author(s):  
Rahmat Bin Ghazali ◽  
Nor Jijidiana Binti Azmi

Global Climate Change can affect human life and activities. The rising amount of natural disasters, the warming of the Earth and the melting of the icebergs are some examples of its effects. This study is conducted to analyze the coverage of global climate change issue in four Malaysia mainstream newspapers. The data for this study are collected from January 2008 to December 2010. A content analysis is conducted to identify the frequency of the articles related with global climate change, the articles length, the trend of newspaper coverage and the frames of the articles. The findings for this study will provide an understanding about the ways Malaysia mainstream newspapers provide the coverage about Global Climate Change and the audience reactions towards the issue. The findings also suggested that the coverage of global climate change is influenced by the events pertaining the issue. This can be observed from the trend of newspaper coverage. Finally, the result on the frames indicates that the most published topic in global climate change issue is public action to reduce the effects of global climate change and reduce the emissions of the greenhouse gas.


2018 ◽  
Vol 1 (1) ◽  

Climate change is inevitable. Contributing to this change are (1) natural effects, which include the Earth in an interglacial period and (2) various other effects such as anthropogenic effects, which include the release of non-indigenous gases into the atmospheres. However, the exact contribution of each effect to global climate change is not known with any degree of certainty and the blame can only be partially laid on the existence of the interglacial period and somewhat less on other effects. It is not the purpose of this paper to debunk the idea of climate change but to recognize other factors that can play a role in the changing climate.


GeoTextos ◽  
2014 ◽  
Vol 10 (1) ◽  
Author(s):  
Francisco Ronnieplex De Moura Cruz ◽  
Letícia Andrade da Silva ◽  
Elisiene De Macêdo Pereira ◽  
Rebecca Luna Lucena

Este ensaio traz à tona questões intrigantes e dúvidas que permeiam as pesquisas voltadas às mudanças climáticas globais, enfatizando as discordâncias existentes entre as distintas correntes de cientistas e os prognósticos elaborados pelos modelos de previsão do clima. Para tanto, tomou-se por base as teorias propagadas por alarmistas e céticos, bem como o prognóstico do Painel Intergovernamental sobre as Mudanças Climáticas (IPCC) de 2007. O ensaio se baseou na análise de livros, relatórios técnicos e artigos científicos, além da interpretação dos gráficos contidos nos mesmos. Os resultados mostraram que sempre houve variação na temperatura da atmosfera, mesmo antes do surgimento do homem e em níveis bem mais elevados do que os atuais. Contudo, alarmistas e céticos concordam que a Terra passou por um aquecimento de cerca de 0,6ºC no século XX, havendo divergência no que diz respeito às causas desse aquecimento, suas consequências, e se ele ainda está ocorrendo. Entretanto, um aspecto que põe em xeque a confiabilidade de ambas as correntes diz respeito ao problema da previsão, pois são muitos os fatores e elementos envolvidos na complexidade do sistema climático, tornando, assim, previsões climáticas exatas praticamente impossíveis, e deixando o debate, até o momento, no campo das suposições. Abstract DISCUSSIONS ABOUT GLOBAL CLIMATE CHANGES: THE ALARMISTS, THE SKEPTICS AND CLIMATE FORECAST MODELS This paper aims to discuss difficult questions and doubts about researches regarding global climate change, showing discordances about what different scientific groups and the forecasts elaborated by forecasting climate models. Therefore, we take for basis the theories formulated by the two scientific groups: the alarmists and skeptics, and the prognostic showed by the Intergovernmental Panel of Climate Change (IPCC), 2007. This work was based in a research of books, technical documents and scientific papers, and the interpretation of graphs and data within these works. The results showed that oscillating temperatures always existed in the Earth’s atmosphere before human existence and the oscillation was larger than today. However, alarmists and skeptics believe that the earth atmosphere’s temperature elevated by approximated 0.6º C in the XX century, but there is a big divergence about the causes that rise and the consequences. Finally, an issue that questions the reliability of both groups, concerns the problem of forecast mainly because there are many factors and elements involved in the complexity of climate system thus making accurate climate predictions virtually impossible and leaving the debate so far, in the field of assumptions.


Sign in / Sign up

Export Citation Format

Share Document