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"This comic is a timeline on how the temperature has changed from 20,000 BCE (Before Common Era) to the present day (2016), with three predictions for the rest of the 21st century depending on what actions are taken (or not taken) to stop CO₂ emission. This comic is a direct, but much more thorough, follow up on the previous global warming comic: 1379: 4.5 Degrees. By having readers scroll through millennia of slow-paced natural changes, Randall uses the comic to confront the the rapid temperature rise in the recent years. Over the past 100 years, human action has produced a large amount of CO₂ emissions, which have caused a rise in average global temperature through the greenhouse effect. This is called global warming and is part of a climate change, a subject that has become a recurrent subject on xkcd. There are still many people who claim that this is not happening, or at least that it is not caused by any human actions, called climate change deniers. One argument of theirs is that global warming is happening for natural causes, summarized with the phrase "temperature has changed before". "

"Our core ecological problem is not climate change. It is overshoot, of which global warming is a symptom. Overshoot is a systemic issue. Over the past century-and-a-half, enormous amounts of cheap energy from fossil fuels enabled the rapid growth of resource extraction, manufacturing, and consumption; and these in turn led to population increase, pollution, and loss of natural habitat and hence biodiversity. The human system expanded dramatically, overshooting Earth's long-term carrying capacity for humans while upsetting the ecological systems we depend on for our survival. Until we understand and address this systemic imbalance, symptomatic treatment (doing what we can to reverse pollution dilemmas like climate change, trying to save threatened species, and hoping to feed a burgeoning population with genetically modified crops) will constitute an endlessly frustrating round of stopgap measures that are ultimately destined to fail."

"Is the form that you receive a message as significant as the message itself? Marshall McLuhan argued that throughout history what has been communicated has been less important than the particular medium through which people communicate. The technology that transfers the message changes us and changes society, the individual, the family, work, leisure and more. Narrated by Gillian Anderson. Scripted by Nigel Warburton. From the BBC Radio 4 series about life's big questions - A History of Ideas. This project is from the BBC in partnership with The Open University, the animations were created by Cognitive."

"A newly unearthed journal from 1966 shows the coal industry, like the oil industry, was long aware of the threat of climate change. "Exxon knew." Thanks to the work of activists and journalists, those two words have rocked the politics of climate change in recent years, as investigations revealed the extent to which giants like Exxon Mobil and Shell were aware of the danger of rising greenhouse gas emissions even as they undermined the work of scientists. But the coal industry knew, too - as early as 1966, a newly unearthed journal shows."

* Create new PDF or edit existing ones. * Add and/or edit bookmarks in PDF files. * Fast and simple PDF forms fill out. * Changing font attributes (size, family, color etc). * Encrypt and/or protect PDF files using 128 bit encryption. * Convert XPS files into PDF. * JavaScript support. * Dynamic XFA form support. * Validation Forms and Calculate Values. * Add PDF controls (like buttons, checkboxes, lists, etc.) into your PDFs. * Import/export PDF pages into common graphical formats including BMP, JPG, PNG, and TIFF. * Signing PDF documents with digital signature, signatures creation and validation. * Free PDF Editor on Linux ( for non-commercial use)

* Create new PDF or edit existing ones. * Add and/or edit bookmarks in PDF files. * Fast and simple PDF forms fill out. * Changing font attributes (size, family, color etc). * Encrypt and/or protect PDF files using 128 bit encryption. * Convert XPS files into PDF. * JavaScript support. * Dynamic XFA form support. * Validation Forms and Calculate Values. * Add PDF controls (like buttons, checkboxes, lists, etc.) into your PDFs. * Import/export PDF pages into common graphical formats including BMP, JPG, PNG, and TIFF. * Signing PDF documents with digital signature, signatures creation and validation. * Free PDF Editor on Linux ( for non-commercial use)

"The time is now. For decades, scientists have been raising calls for societal changes that will reduce our impacts on nature. Though much conservation has occurred, our natural environment continues to decline under the weight of our consumption. Humanity depends directly on the output of nature; thus, this decline will affect us, just as it does the other species with which we share this world. Díaz et al. review the findings of the largest assessment of the state of nature conducted as of yet. They report that the state of nature, and the state of the equitable distribution of nature's support, is in serious decline. Only immediate transformation of global business-as-usual economies and operations will sustain nature as we know it, and us, into the future."

Muy interesante herramienta para pasar tablas de datos a visualizaciones gráficas, en vectores y personalizables... "RAW works with tabular data (i.e. information which is possible to record or track in a spreadsheet). There are many ways you can upload your data in RAW: Dropping a plain text file containing delimiter-separated values such as .csv or .tsv. File extension does not matter, as long as you use one of these delimters: comma, semicolon, tab or colon. Copying and pasting your data from a spreadsheet (e.g. Microsoft Excel, Google Docs, Apple Numbers...) or a text file. This is particularly helpful when you do not want to (or can not) export your data any time you change it or when you want to use only specific columns. Typing your data directly into the text area. While it is unlikely to use this option, it can be useful for editing your data."

Knowmad Society explores the future of learning, work, and how we relate with each other in a world driven by accelerating change, value networks, and the rise of knowmads.

Publicado el 15 mar. 2012 Our world is changing at an unprecedented pace. To prepare our students, lessons must go beyond the "3 R's" and foster 21st century skills. Skills like critical thinking, communication, collaboration and creativity will be essential for students to take on the challenges and opportunities that lie ahead.

"there is no live teacher engagement... Currently, just 10 percent of MOOC registrants complete their courses. Where Will MOOCs Be Just Two Years From Now? Within the next two years, MOOCs will quickly evolve from lacking teacher engagement to having a lot of teacher engagement. Right now, it's essentially a model where computers are teaching students. This model is simply not sustainable in the long run without live student-teacher engagement. Teachers are the key that unlocks learning in these courses. They help students resolve issues and problems. Will the biggest change in online education moving forward be putting live teachers at the center of the MOOC (not just on video)? We will know the answer very soon."

"En una charla que presentó en Denver, Colorado, el 28 de marzo de 1998, titulada Five Things We Need to Know About Technological Change, propuso cinco cosas que necesitamos saber acerca de cualquier cambio tecnológico. Aquí, un resumen: Primera idea Para cada ventaja que una nueva tecnología ofrece, hay siempre una desventaja correspondiente. Segunda idea Las ventajas y desventajas de nuevas tecnologías nunca están distribuidas equitativamente entre la población. Tercera idea Incorporada en cada tecnología hay una idea poderosa, a veces dos o tres ideas poderosas. Cuarta idea El cambio tecnológico no es aditivo, es ecológico. Un nuevo medio no agrega algo; cambia todo. Quinta idea Los medios tienden a volverse míticos. Cuando una tecnología se vuelve mítica, es siempre peligroso porque entonces es aceptada tal cual, y por consiguiente no es fácilmente susceptible a modificación o control."

"... Reclaiming pedagogy as a form of educated and militant hope begins with the crucial recognition that education is not solely about job training and the production of ethically challenged entrepreneurial subjects and that artistic production does not only have to serve market interests, but are also about matters of civic engagement and literacy, critical thinking, and the capacity for democratic agency, action, and change. It is also inextricably connected to the related issues of power, inclusion, and social responsibility.[2] If young people, artists, and other cultural workers are to develop a deep respect for others, a keen sense of the common good, as well as an informed notion of community engagement, pedagogy must be viewed as a cultural, political, and moral force that provides the knowledge, values, and social relations to make such democratic practices possible. In this instance, pedagogy needs to be rigorous, self-reflective, and committed not to the dead zone of instrumental rationality but to the practice of freedom and liberation for the most vulnerable and oppressed, to a critical sensibility capable of advancing the parameters of knowledge, addressing crucial social issues, and connecting private troubles into public issues. Any viable notion of critical pedagogy must overcome the image of education as purely instrumental, as dead zones of the imagination, and sites of oppressive discipline and imposed conformity. ..."

"John Foran, artículo original: http://www.resilience.org/stories/2017-06-08/climate-change-hope-and-revolution-notes-for-dark-and-gloomy-times/ El otro día me invitaron a dar una charla en la clase de Estudios Medioambientales de un colega titulada, simplemente, "Esperanza". Resulta que era el día después de que Donald Trump pronunciase sus calculadas y genocidas estupideces sobre el Acuerdo de París (que el insistía en llamar Accord [el autor usa la palabra Agreement para acuerdo, nota del tr.]. A estas alturas, se han dicho y escrito cien mil palabras de ira, determinación y análisis. Vayamos pues en la dirección opuesta. ..."

"Our new blog is designed to radically reduce the energy use associated with accessing our content. Low-tech Magazine was born in 2007 and has seen minimal changes ever since. Because a website redesign was long overdue - and because we try to practice what we preach - we decided to build a low-tech, self-hosted, and solar-powered version of Low-tech Magazine. The new blog is designed to radically reduce the energy use associated with accessing our content. Why a Low-tech Website? We were told that the Internet would "dematerialise" society and decrease energy use. Contrary to this projection, it has become a large and rapidly growing consumer of energy itself. In order to offset the negative consequences associated with high energy consumption, renewable energy has been proposed as a means to lower emissions from powering data centers. For example, Greenpeace's yearly ClickClean report ranks major Internet companies based on their use of renewable power sources."

"A state-of-the-art supercomputer simulation indicates that a feedback loop between global warming and cloud loss can push Earth's climate past a disastrous tipping point in as little as a century. On a 1987 voyage to the Antarctic, the paleoceanographer James Kennett and his crew dropped anchor in the Weddell Sea, drilled into the seabed, and extracted a vertical cylinder of sediment. In an inch-thick layer of plankton fossils and other detritus buried more than 500 feet deep, they found a disturbing clue about the planet's past that could spell disaster for the future. Lower in the sediment core, fossils abounded from 60 plankton species. But in that thin cross-section from about 56 million years ago, the number of species dropped to 17. And the planktons' oxygen and carbon isotope compositions had dramatically changed. Kennett and his student Lowell Stott deduced from the anomalous isotopes that carbon dioxide had flooded the air, causing the ocean to rapidly acidify and heat up, in a process similar to what we are seeing today."

"To revert the current ecological overshoot and build a sustainable society, we have to collectively engage in changing our economic model. "Sufficiency: moving beyond the gospel of eco-efficiency" suggests introducing hard limitations to unsustainable trends-in particular to overconsumption-and putting emphasis on distributional justice. Seven chapters written by sustainability and economics experts plus a foreword by Janez Potočnik (Co-chair of the International Resource Panel and former European Commissioner for the Environment) shed light on different angles of sufficiency and formulate concrete recommendations to EU policy makers. The booklet ends with a discussion of several eco-social policies that can start the transition towards an "economics of enough". Many new ideas for an economic paradigm shift have been developed and discussed at the academic and grassroots levels in recent years. The aim of this booklet is to build on a rich body of knowledge and bring these ideas to the attention of engaged citizens and policy makers in order to advance the debate on how to implement sufficiency."

"This is not an environmental book, even though it is concerned with the environment. It is not a book to save the world, even though the world is clearly in trouble. Ultimately, A Matter Of Scale is a book about survival; about ensuring that every individual human has the means to save herself or himself from the crisis that is unfolding. And there most certainly is a crisis; like the waves of a surging river; small and irregular at first, but growing larger, creating whirlpools, rising in treacherous white water, and eventually inundating everything in its path. People know that the climate is changing, that species are being removed from the Earth at a rapidly increasing rate, that entire ecosystems are becoming shadows of their former richness; they know, but they do not understand. The environmental crisis is closing in on humanity from all directions, yet the crisis barely registers on this culture's list of problems. As we stand, humanity is doomed to a collapse that will leave only a few nomads, and a toxic, barely survivable Earth in its wake."