Monthly Archives: August 2009


This is time for me to present my selection of the best pictures of the NASA’s Astronomy Picture of the Day (APOD). As always, this month was packed with beautiful images. It was a bit difficult to select just ten. Here is today’s picture description : “spanning about 50,000 light-years, […]

Great astrophotographies – August 2009


Since I don’t have much time to blog, I restrain myself to publishing here around 25 articles per month. However, many more great news are worth reading and blogging about. My goal being to provide you with the latest headlines and best researches on sustainable development, climate change and the […]

Worth an article – my August 2009 tweets


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High speed rail is a fantastic sustainable alternative to cars and planes for longer distances. This is why countries such as Spain, China or the United States are currently working or plan to work on such projects. Due to halve the time necessary to link by train the capital to […]

UK considers High Speed Rail project



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It is a well known fact, US gasoline tax is ridiculously low compared to many countries in the European Union and other nations. The table on the left brings data from the OECD on this. US drivers pay less than 10 euro cents per liter of tax when their German, […]

Could the US tax more gasoline ?


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Even if this not new as I wrote about this very issue as early as June 2008, the additional research bring us more data on how renewables – and especially biofuels – need much more land to generate energy than traditional solutions. As you can see with the graph biofuels […]

Energy sprawl is another reason to mix sources


For this month’s article on CleanTechies we are moving from cleantech in France to focus on water management in Singapore as I read Erik Orsenna’s book on water. There are many interesting things to learn there. From massive rainwater harvesting to water treatment with 15 reservoirs and recycling and desalination, […]

Water in Singapore : Conserve, Value, Enjoy



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There is a lot of buzz going on about waste to energy as many cities are thinking about it. Meanwhile, a CleanTechies’ member started a most interesting series on the matter and one of my follower on Twitter wonders if it should be supported. Personally I think we should reduce, […]

Is waste to energy a good idea ?


My main trades and areas of interest before climate change mitigation and sustainable development are international business and management. This brought me to focus early on India. So when I discovered today’s book via The Daily Show with Jon Stewart I knew I had to read what promised to be […]

Imagining India, by Nandan Nilekani


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To a new study presented by a US non-governmental organization, the European cap and trade system – called Emission Trading System or ETS – seems to finally work after a much difficult start. To TreeHugger: The trading system has created a healthy carbon market now worth 56 billion US dollars, […]

The European Cap and Trade system works fine



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In these times of heat waves – it was 37°C here in France yesterday  – we all know that solar energy can heat places but it seems the sun could also cool them down thanks to air conditioning. Even if this is not entirely new as I read about such […]

Why solar air conditioning is a fantastic idea


A map of the Least Developed Countries 1

It is no news if you have been reading this blog as China – alongside with other nations – has been calling the richest nations to cut drastically their GHG emissions by 2020 in order to prevent the worse from occurring. Now the 49 least developed countries are calling the […]

Least developed nations call for climate action


I read in The Daily Green an article on how natural gas could be a solution to environmental and energy issues in the United States as it emits half the carbon dioxide of coal and roughly 25 percent less than oil. Another advantage of this fossil fuel is that there […]

Can natural gas be an alternative to coal ?