Energy Tower: Power for 15 Earths? Researchers have designed a product that its inventors claim could easily produce between 15 and 20 times the total electricity the world uses today. Not only that, it could also be used as a desalination device and may be able to reverse the effects of global warming. Those are pretty big claims, but the researchers from the Technion - Israel Institute of Science seem confident that the "Energy Tower" could be a major solution to the world's problems. They've been working on the concept since 1983, and together have spent more than 150 man-years researching, designing, testing, and analyzing. As project founder Professor Dan Zaslavsky explains, the Energy Tower works on the basic principle of convection: hot air rises and cold air falls. The 3,000-foot tall tower, with a diameter of 1200 feet, would take advantage of the heavy falling weight of cold air. Any kind of water - from a sea or drainage ditch - would be added to the top of the tower. Via: Israel21c
Home Energy Magazine Online Köppen climate classification An updated Köppen–Geiger climate map Köppen climate classification is one of the most widely used climate classification systems. It was first published by Russian German climatologist Wladimir Köppen in 1884, with several later modifications by Köppen, notably in 1918 and 1936. Later, German climatologist Rudolf Geiger (1954, 1961) collaborated with Köppen on changes to the classification system, which is thus sometimes called the Köppen–Geiger climate classification system. The Köppen climate classification system has been further modified, within the Trewartha climate classification system in the middle 1960s (revised in 1980). The Trewartha system sought to create a more refined middle latitude climate zone, which was one of the criticisms of the Köppen system (the C climate group was too broad).:200–1 Meaning of symbols Group A: Tropical (megathermal) climates Group B: Dry (arid and semiarid) climates This type of climate is defined by little precipitation. Scheme
The Copenhagen Diagnosis California Cars Initiative for Plug-In Hybrids The ethical wardrobe: Is it OK to wear leather? | Fashion Whether or not you chose to wear leather usually depends on your stance towards meat, be it vegan, vegetarian or carnivore. The issue of whether or not you are at ease with the practices of the meat industry is one for your own conscience: this column aims merely to provide some facts in an area where there is frequent misconception. Many people happily wear leather on the grounds that it's a byproduct of animal slaughter for meat and therefore a form of recycling - waste not, want not. Farmers don't sell hides for tuppence ha'penny out of the kindness of their hearts or from a desire to minimise waste. Take ostrich, for example - in South Africa, ostrich farms are a developing industry. Another oddity is that demand is rising for organic or free-range meats, as an increasing number (though still a tiny minority) of people try to source their food as ethically as possible. As I have tried to emphasise, if none of this troubles you then buying leather goods poses no problem.
AlGore.com Énergie solaire Un article de Wikipédia, l'encyclopédie libre. Rayonnement solaire direct. Répartition de l'énergie solaire moyenne reçue au sol L'énergie solaire est la fraction de l'énergie du rayonnement solaire qui apporte l'énergie thermique et la lumière parvenant sur la surface de la Terre, après filtrage par l'atmosphère terrestre. Sur Terre, l'énergie solaire est à l'origine du cycle de l'eau, du vent et de la photosynthèse réalisée par le règne végétal, dont dépend le règne animal via les chaînes alimentaires. Cet article traite de l'énergie produite par l'homme en captant le rayonnement émis par le Soleil, principalement sous forme électrique ou thermique. Historique[modifier | modifier le code] L'utilisation de l'énergie solaire remonte à l'Antiquité. Le Français Salomon de Caus construit en 1615 une pompe solaire, grâce à l'utilisation d’air chauffé par le rayonnement solaire. En 1747, Georges-Louis de Buffon expérimente un miroir qui concentre la lumière du soleil en un seul point focal.
Cowspiracy: stampeding in the wrong direction By focusing on veganism to the exclusion of all else, Cowspiracy implies that anyone who eats meat isn’t a ‘proper’ environmentalist. This is deeply offensive and elitist, and it harms the movement we need to build. Danny Chivers is a professional carbon analyst, performance poet, climate activist, and author of the No-Nonsense Guide to Climate Change and No-Nonsense Renewable Energy. This article is republished, under a Creative Commons License, from New Internationalist. by Danny Chivers “Why do you keep talking about fossil fuels? If you’ve posted anything online about fossil fuels and climate change lately, the chances are you’ve seen a response like this. This is not the enemy The film has built a sizable and vocal following, as evidenced by the critical Cowspiracy-inspired comments that frequently pop up on articles about climate change, bemoaning the lack of coverage of the climate impact of animal agriculture. But I don’t. Don’t use the 51 per cent figure. Notes
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