Sciences

Economie circulaire, sciences et science fiction, en direct des Utopiales 2022.

Sunday, November 6, 2022 / En Français, Sustainable development / Leave a Comment

Le week-end dernier avait lieu à Nantes le rendez-vous incontournable des passionnés de sciences et des férus de science-fiction : les Utopiales. Cette édition 2022 était particulièrement marquée par les thématiques des nombreuses limites et transitions auxquelles nos sociétés font face. La dernière conférence à laquelle j’ai assisté dimanche était particulièrement fascinante : « Remplaçons la ligne …

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Stunner : carbon dioxide role known as early as 1932

Tuesday, December 3, 2013 / Climate change, Sciences / Leave a Comment

While vested interests are still denying the warming role in our atmosphere of carbon dioxide, TreeHugger has unearthed a study from early as 1932 showing that this gas is actually warming our Planet. This was 81 years ago ! I had heard or rather read that this was known from at least since the 1980s …

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Graphene could bring solar PV efficiency to 60%

Friday, March 15, 2013 / Cleantech, Energy / Leave a Comment

According to TreeHugger, graphene could offer 60% solar cell efficiency if it were to replace silicon in PV panels. As they note : ” Researchers from the Institute of Photonic Sciences in Spain have just published results from their experiments.” ” While their results so far will probably be more useful to make better image …

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A 1.5°C temperature rise could be game over for our civilization

Monday, March 4, 2013 / Climate change / 2 Comments

Oooops ! According to Cleantechies, a 1.5°C temperature rise ” could unleash more than 1,000 gigatons of carbon and methane currently trapped beneath Siberian permafrost and accelerate global climate change. “ 1.5°C is considered as the low level of potential climate warming to date. This is even more worrying as such quantities of greenhouse gases …

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Here come the toilets of the future

Wednesday, July 4, 2012 / Environment, Sciences / 2 Comments

Here is a smelly question : why are we putting together what Nature separates ? This is the question asked by a Swedish researcher about toilets. Putting urine and feces together is not a good idea as it is simply a waste of resources. Moreover, flushing with liters and liters of perfectly drinkable water is …

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WHO : diesel exhausts cause lung cancer

Sunday, June 24, 2012 / Sustainable development / Leave a Comment

According to the World Health Organization : ” the WHO  today classified  diesel  engine  exhaust  as carcinogenic  to  humans,  based  on  sufficient  evidence that exposure is associated with an increased risk for lung cancer.“ This is a bad news for me as I recently changed for a diesel car and I am amazed at how …

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For algae biofuels, it’s all about patience

Sunday, May 20, 2012 / Cleantech, Energy / Leave a Comment

Will your car – or mine, or any vehicle – be powered one day by algae ? Despite this solution being a great one compared to more traditional biofuels, we will have to be (really) patient as GigaOM notes : ” In 2010, Pike Research predicted that by 2020, the algae biofuel industry would only …

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Climate change to worsen allergies

Saturday, May 19, 2012 / Climate change / Leave a Comment

If a weirder climate, rising sea levels and so on and so forth weren’t enough to motivate us to combat climate change, here is another reason to do so. As Al Gore notes on his blog : “Watery eyes, runny noses and puffy faces will abound this year as a warm winter, human development and …

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Global warming close to becoming irreversible

Monday, April 2, 2012 / Climate change / Leave a Comment

To Reuters : ” The world is close to reaching tipping points that will make it irreversibly hotter, making this decade critical in efforts to contain global warming, scientists warned on Monday. (…) As emissions grow, scientists say the world is close to reaching thresholds beyond which the effects on the global climate will be …

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Earth is losing 500 billion tons of ice a year

Wednesday, February 22, 2012 / Climate change / 2 Comments

To the NASA : ” Using satellite measurements (…), the researchers measured ice loss in all of Earth’s land ice between 2003 and 2010, with particular emphasis on glaciers and ice caps outside of Greenland and Antarctica. ” ” The total global ice mass lost from Greenland, Antarctica and Earth’s glaciers and ice caps during …

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Research on algae biofuels is booming

Sunday, February 12, 2012 / Energy / Leave a Comment

If traditional / first generation biofuels based on cereals are nowhere near being sustainable, the ones based on algae could be a good or even great solution in the not so far future… Some entrepreneurs and scientists are sharing this opinion as the New Mexico Business Weekly reports than at least three different companies are …

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