Definition Climatefarming en francais

Definition Climate Farming

Climate farming uses agricultural means to keep carbon dioxide and other greenhouse gasses from escaping into the atmosphere. Like organic farming, climate farming maintains biodiversity and ecological balance on productive, argicultural land. But climate farmers like Hans-Peter Schmidt go a step further and covert leftover organic mass into biochar, a solid carbon compound that can improve soil quality. Biochar production also creates a kind of gas that can then be burned to help generate power. A climate farm could grow food, generate power, and help keep carbon out of the air.

Climatefarming – Pour une agriculture durable

von Hans-Peter Schmidt

Le climatefarming est souvent décrit comme une méthode agricole au moyen de laquelle du CO2 est prélevé de l’atmosphère et stocké de façon stable dans le sol sous forme de carbone. Ceci pourrait permettre de freiner le changement climatique. Mais le climatefarming, c’est également un concept écologique durable pour l’agriculture du future, qui produira aussi bien des denrées alimentaires que de l’énergie et de l’air propre, encouragera la biodiversité et protégera le paysage.

Au travers de leurs feuilles, les plantes prélèvent du dioxyde de carbone contenu dans l’air et le transforment à l’aide de la lumière, de substances minérales et de l’eau en molécules carboniques. Lorsque la plante meurt ou pourrit, ou si elle est mangée et digérée, les molécules longues de carbone sont de nouveau scindées. Ce processus libère de l’énergie et donc du carbone qui, composé à plus de 99% de CO2, s’évapore dans l’atmosphère. (en savoir plus ...)

Donnerstag, 12. August 2010

Biochar has huge carbon offset potential: study - News - UNSW - Science

Biochar has huge carbon offset potential: study - News - UNSW - Science

Biochar has huge carbon offset potential: study
By Bob Beale
August 11, 2010

Biochar is a fine-grained, highly porous charcoal that helps soils retain nutrients and water. (Image credit: International Biochar Initiative)

Up to 12 percent of the world’s human-caused greenhouse gas emissions could be sustainably offset by producing biochar from plants and other organic material, according to a new study published in the journal Nature Communications.

"This study demonstrates that biochar can help tackle our climate concerns in a major and sustainable way," says Visiting Professor Stephen Joseph, a biochar pioneer in the UNSW School of Materials Science and Engineering and one of the authors of the study.

"The beauty of the technology is that it is a win-win solution: it can be used to produce energy but at the same time reduce carbon dioxide emission in the atmosphere."

Biochar is made by thermally decomposing agricultural and urban residues such as green waste, chicken manure, rice husks, corn cobs and peanut shells at relatively low temperature in a process called pyrolysis. Many biochars are stable for over 100 years and some biochars even thousands of years, keeping greenhouse gases like carbon dioxide out of the air longer. Normally, such material would break down (compost) and release its carbon into the atmosphere within a decade or two.

The pyrolysis process also produces some bio-based gas and oil that can produce energy offsetting emissions from the burning of fossil fuels....

Biochar has huge carbon offset potential: study - News - UNSW - Science

Climatefarming in northern Senegal