Biochar – A Waste Product that Can Reduce Climate Change

Biochar is a waste product that has the potential to assist combat climate change. For the first time, worldwide review research explains how it enhances a plant’s root zone. According to research, biochar may help improve agricultural yields in poor soils and mitigate the impacts of climate change. So why aren’t we making greater use of it?

According to a UNSW-led worldwide study, a product produced from urban, agricultural, and forestry waste offers the additional advantage of lowering contemporary farming’s carbon impact. the research published in GCB Bioenergy offers “strong evidence” that biochar may help with climate change mitigation. It claims that it may pull down carbon from the atmosphere into the soil and store it for hundreds to thousands of years. This research also discovered that it may help build organic carbon in soil by up to 20% (on average 3.8%) and can decrease nitrous oxide emissions from the soil by 12 to 50%, increasing biochar’s climate change mitigation advantages.


The results are backed up by the recent Special Report on Climate Change and Land by the Intergovernmental Panel on Climate Change, which indicated that biochar had significant climate change mitigation potential. The international panel estimated that it might reduce between 300 million and 660 million tons of carbon dioxide per year worldwide by 2050. In comparison to Australia’s emissions last year, which were projected to be 499 million tons of carbon dioxide, you can see how it can absorb a lot of carbon dioxide. All we need now is the will to develop and utilize it.

Stable Charcoal

Biochar is produced via pyrolysis, which involves heating biomass wastes such as wood chips, animal manures, sludges, compost, and green garbage in an oxygen-depleted atmosphere. As a consequence, stable charcoal is produced, which may reduce greenhouse gas emissions while also improving soil fertility. The GCB Bioenergy research looked at around 300 articles, including 33 meta-analyses that looked at many of the 14,000 biochar studies published in the past 20 years.

It discovered average crop yields rose from 10% to 42 percent, heavy metal concentrations in plant tissue were decreased by 17 to 39% and phosphorus availability to plants increased as well. Biochar helps plants withstand environmental stressors including diseases, as well as harmful metals, water stress, and chemical substances like the pesticide atrazine.


Advantage for Plants

For the first time, the research shows how biochar enhances a plant’s root zone. It may promote seed germination and seedling development in the first three weeks when it interacts with the soil. Reactive surfaces are formed on biochar particles during the following six months, increasing nutrient delivery to plants. It begins to ‘age’ in the soil after three to six months, forming micro-aggregates that preserve organic materials from degradation.

The best responses to biochar were observed in acidic and sandy soils when biochar was used in conjunction with fertilizer. It discovered that the beneficial benefits of biochar were dosage-dependent and also depended on matching the characteristics of the biochar to soil limitations and plant nutritional needs. Biochar may help plants, especially in low-nutrient, acidic soils prevalent in the tropics and wet subtropics, such as the north coast of NSW and Queensland.

Sandy soils in Western Australia, Victoria, and South Australia, especially in dryland areas more prone to drought as a result of climate change, will also benefit significantly.  Researcher claims that Indigenous peoples in Australia, Latin America (particularly in the Amazon basin), and Africa have been using biochar for hundreds of years to grow crops and preserve healthy soils. Biochar was also used as a feed additive for livestock in the 17th century.

However, although Australian academics have been studying biochar since 2005, the commercialization of the substance has been sluggish, with Australia generating just around 5000 tons per year. This is due in part to the small number of large-scale demonstration programs that have been funded, as well as farmers’ and government advisors’ lack of biochar knowledge, regulatory hurdles, and a lack of venture capital and young entrepreneurs to fund and build biochar businesses, In contrast, the United States produces about 50,000 tons per year, while China produces over 500,000 tons per year. 

It Must Be Financially Feasible.

Biochar to be widely adopted, it must be easily incorporated into agricultural operations and shown to be economically feasible. However, as major companies purchase carbon dioxide reduction certificates (CORCs) to offset their emissions, this is progressively changing, raising biochar’s visibility in Australia. It may be used for a variety of purposes. It highlighted biochar’s lesser-known applications, including as a building material, for reducing toxins in the soil, growing microorganisms, animal feed, and soil remediation. UNSW has a grant with a business and a university in Norway to create a biochar-based anti-microbial layer that would fight pathogens in water and be used in air filtration systems.

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1 Comment

Sustainable Development 17 Goals -UNSSD - The Green Politics · September 6, 2021 at 9:39 am

[…] Climate change is already affecting public health, food, and water security, human migration, peace, and security. Climate change, left unchecked, will reverse the progress we have made over the decades and will make some benefits impossible. Investing in sustainable development will help address climate change by reducing greenhouse gas emissions and building resilience. On the other hand, action on climate change will drive sustainable development. Addressing climate change and promoting sustainable development are issues that strengthen the common currency race; Sustainable development cannot be achieved without climate action. On the other hand, many SDGs are at the forefront of climate change drivers. […]

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