2018/09/30: Agriculture has historically been a circular industry where crops use nutrients in the soil to grow which are then replaced through compost or manure. But globalisation and industrialisation of the food supply chain has disrupted this cycle, driving farming practices that have helped degrade a third of the planet’s land.
Scientists are now looking at ways of tackling this problem with an approach that will not only restore nutrients to the soil but also help to offset the greenhouse gas emissions produced by agriculture.
‘Farm land could work as carbon sinks,’ said Dr Jan Mumme, an agricultural engineer at the University of Edinburgh in the UK. ‘This probably wouldn’t work with intensive livestock farming, but sustainable crop production and integrated farm systems (a balance between crops and livestock) could do it – and biochar is one way to help.’
Biochar is a substance formed of biomass – such as wood and crop waste, sewage sludge and paper waste – that is heated to 400-800°C under limited oxygen conditions to make a charcoal-like product. This can be then added to soil, where it not only stores carbon, but also interacts with microbes in the soils to improve their ability to capture additional nutrients and soil carbon.
Until now, however, biochar has received mixed results when tested for its effects on soils and crop yields.
2018/09/12: the world needs more swamps.
wetlands are extremely efficient at pulling carbon dioxide out of the atmosphere and converting it into living plants and carbon-rich soil.
If ecosystems, particularly forests and wetlands, did not remove atmospheric carbon, concentrations of carbon dioxide from human activities would increase by 28 percent more each year.
A new study shows that extra CO2 in the atmosphere isn't speeding up rainforest tree growth. Uh oh?
Through burning fossil fuels, humans are rapidly driving up levels of carbon dioxide in the atmosphere, which in turn is raising global temperatures. But not all the CO2 released from burning coal, oil
Iron in Sahara dust shown to produce massive Bahama carbon sink with similar effects proposed in ocean regions around the world.