Tag Archive for: Reverse Climate Change

Carbon farming is a zero-risk strategy for curbing climate change

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Author: David Wolfe

Now that 195 nations, including the U.S., have agreed to ambitious greenhouse gas emission reductions to slow the pace of climate change, the question everyone is asking is: How will we actually meet our targets set for 2035?

Given past performance, many don’t think we will get there without so-called “geoengineering” solutions, such as blasting sulfur dioxide or other particles into the atmosphere to shade the planet and compensate for the warming effect of greenhouse gases. Clever, eh? Maybe not. Some recent modeling studies show these seemingly easy fixes could backfire in catastrophic ways, such as disrupting the Indian monsoon season and completely drying out the Sahel of Africa. Another risk is atmospheric chemical reactions that deplete the ozone layer. Do we really want to run global-scale experiments for 20 or 30 years and see what happens?

There is another way, one that is zero-risk and builds on something farmers around the world are already motivated to do: manage soils so that a maximum amount of the carbon dioxide plants pull out of the air via photosynthesis remains on the farm as carbon-rich soil organic matter. “Carbon farming,” as it is sometimes called, is Mother Nature’s own geoengineering, relying on fundamental biological processes to capture carbon and sequester it in the soil, carbon that would otherwise be in the air as the greenhouse gas, carbon dioxide.

Over the past century soils worldwide have been degraded due to expansion of agriculture and poor soil management. Today, there is a revolution in agriculture that recognizes the importance of building “healthy” soils by replacing the organic matter that has been lost over time. One way to do this is to use carbon- and nutrient-rich organic sources of fertilizers such as manure or compost rather than synthetic chemical fertilizers. Another is to include carbon- and nutrient-rich crops like legumes (e.g., peas, beans) in rotations, and plant winter cover crops that contribute additional organic matter in the off-season. We’ve also discovered that reducing the amount of plowing and tilling of the soil (“conservation tillage”) slows the microbial breakdown of organic matter that leads to carbon dioxide emissions from soils.

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Farmland Could Help Combat Climate Change

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Author: Bobby Magill

The earth’s soil stores a lot of carbon from the atmosphere, and managing it with the climate in mind may be an important part of reducing greenhouse gas emissions to curb global warming, according to a paper published Wednesday in the journal Nature.

“Climate-smart” soil management, primarily on land used for agriculture, can be part of an overall greenhouse gas reduction strategy that includes other efforts like carbon sequestration and reducing fossil fuel emissions, the paper’s authors said. Many scientists believe new efforts to reduce greenhouse gases in the atmosphere are needed to keep global warming to an internationally agreed-upon limit of 2°C (3.6°F).

“One way to do that is by locking up carbon in soils,” said study co-author Pete Smith, professor of soils and global change at the University of Aberdeen in Scotland. “If we can do this, we can complement efforts in other sectors to stabilize the climate and deliver on the Paris agreement.”

About three times the carbon currently in the atmosphere is stored in the Earth’s soil—up to 2.4 trillion metric tons, or roughly 240 times the amount of carbon dioxide emitted by burning fossil fuels annually.

Much of that is locked up in land used for agriculture. Cropland soil stores atmospheric carbon in organic matter such as manure, roots, fallen leaves and and other pieces of decomposing plants. It doesn’t remain there permanently. It takes decades for the organic matter in the soil to decompose, and the carbon stored within is eventually emitted back into the atmosphere as gas. Soil is responsible for 37 percent of global agricultural greenhouse gas emissions, according to the paper.

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How Carbon Farming Could Reverse Climate Change

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Author: Vera Liang Chang 

As the climate crisis heats up, agriculture is in the hot seat, not only as a contributor to climate change, but also as a potential solution. Eric Toensmeier has spent the last several years tracking both. A lecturer at Yale University, a senior fellow with Project Drawdown, and the author of several books on permaculture, Toensmeier is also the author of the newly-released book, The Carbon Farming Solution: A Global Toolkit of Perennial Crops and Regenerative Agriculture Practices for Climate Change Mitigation and Food Security.

Toensmeier argues that when combined with immense reduction in fossil fuel emissions and adaptation strategies, carbon farming has the potential to return the carbon dioxide in our atmosphere to the “magic number” of 350 parts per million, while feeding people, building more fertile soils, and contributing to ecosystem health.

We spoke with Toensmeier about his thoughts on agroforestry, what happened at the climate summit in Paris, and what strategies farmers, communities, and governments can take to launch carbon farming projects. This conversation has been edited for brevity.

When did you start working on carbon farming and why?

In 2009, I read the book Now or Never. Author Tim Flannery wrote that we need to mitigate climate change and a good way to do that is planting forests. But we can’t plant enough forests because we need land for agriculture. I thought to myself: there are trees that are agriculture; perhaps I have a contribution to make.

You note that agroforestry and perennial staple crops—strategies with immense potential to sequester carbon—have been given little attention to date. Why is that?

There are good reasons to focus on lower-sequestration strategies like no-till, organic annual cropping, and managed grazing. They don’t require farmers to make big changes to what they do, they don’t require people to change their diets, and they don’t require us to add unfamiliar foods to our food system. For example, an animal raised in a managed grazing system is raised differently than in a conventional system, but the cheese is still more or less the same. Moving into a fully perennial system would require fundamental transformation of our food system, from development to technologies. The notion that agriculture can incorporate trees—let alone the notion that agriculture be based on trees—is still new for most of us. Agroforestry produces only a tiny percentage of our food in the U.S.

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The Rise of Regenerative Agriculture

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Imagine a world in which industrial crop production supports healthier air, water and soil; a time when rural communities thrive thanks to their local farms; a world where foods are rife with nutrients and the future of agriculture is a thing of beauty and promise …

This is the vision that grows within regenerative agriculture—a practice of farming, based on ecological principles, that builds soil health and recaptures carbon emissions from the atmosphere.

Regenerative agriculture is building on the principles and practices of organic to help communities and soil thrive. “There is an international movement afoot today that says it’s time to take things a step further,” says industry veteran Tom Newmark, founder and chair of Carbon Underground—a nonprofit dedicated to restoring soil health and helping to address climate issues. Regenerative Agriculture is that step, according to Newmark and a growing number of vocal advocates.

Many modern farming systems, which often include the use of heavy machinery, excessive tilling and harmful chemicals, disrupt the organic matter in the soil. Once the carbon molecules in the soil get exposed to the air, they combine with oxygen to create carbon dioxide, turning a natural carbon exchange system from healthy and fertile soil into a toxic atmospheric gas. These unnatural processes have sickened the living systems within the soil, and in many cases have cut off vitality completely—ruining the health and sustainability in all too many agricultural ecosystems.

The healthy side of dirt

In her recent book, The Soil Will Save Us (Rodale Press, Inc., 2014), author Kristin Ohlson writes about the relationship that plants have with microorganisms in the soil, and the impact that disturbing the soil through unnatural, modern methods is having on our food, our climate, our local communities and our future as a whole.

In a teaspoon of healthy soil, Ohlson says, there are billions and billions of microorganisms, all interacting with plants in a “complex and crucial” ecosystem. “Because it’s not visible to the naked eye, humans have only sort of become aware in the last couple of decades what’s going on down there,” she explains.

Organic carbon in soil is a reservoir for plant nutrients—those that are essential to the health of humans that consume them, as well as the ecosystem they are meant to thrive within. These nutrients include calcium, nitrogen, phosphorous, magnesium and micro-nutrients, which are released in the decomposition though microbial processes.

Carbon in the soil ensures these processes become a vital part of nutrient storage, soil structure, microbial activity, water retention, soil temperature and biodiversity—all elements that contribute to nutrient-rich soil and foods from that soil and the living ecosystem they sustain.

Known by scientists as agro-ecological farming, the principles of regenerative agriculture create healthy farms through practices such as crop rotation, cover cropping, composting and reduced tillage.

Healthy farms can be just as productive, if not more productive, than industrial farms, but are much better for the environment, the economy and the people who plant, harvest and eat the food.

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On World Soil Day, OCA, IFOAM Laud French Government’s Initiative to Address Climate Change via Carbon Sequestration in Organic Soil

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FOR IMMEDIATE RELEASE

December 5, 2015

CONTACT:  Organic Consumers Association, Katherine Paul, 207-653-3090, katherine@organicconsumers.org

On World Soil Day, OCA, IFOAM Laud French Government’s Initiative to Address Climate Change via Carbon Sequestration in Organic Soil

December 5 marks end of International Year of the Soils, beginning of work to replace degenerative industrial ag with organic regenerative strategies that can reverse global warming

PARIS – As the International Year of the Soils officially ended on December 5, World Soil Day, Organic Consumers Association (OCA) and IFOAM Organics International (IFOAM) praised the French Government’s 4 per 1000 Initiative as the most important climate strategy to come out of the COP21 Paris Climate Talks.

“This is the most exciting news to come out of COP21,” said Andre Leu, president of IFOAM Organics International. “By launching this Initiative, the French Government has validated the work of scientists and farmers and ranchers who have demonstrated the power of organic regenerative agriculture to restore the soil’s natural ability to draw down and sequester carbon.

“It is imperative that world the decarbonizes the atmosphere from 400 ppm to far less than 350 ppm to stop catastrophic climate change. The combination of renewable energy to stop further emissions and drawing down excess CO2 into the soil is most achievable way to do this and it is readily available to us now.”

“What better way to celebrate World Soil Day than to recognize that healthy soil is our most available, most promising solution to global warming,” said Ronnie Cummins, OCA’s international director. “As we celebrate this important Initiative and also mark the end of the International Year of the Soils, we look forward to what is arguably the most important work our organizations and our governments face—reversing global warming before it’s too late.”

OCA and IFOAM Organics International are among the 100 partners who were signed on at the launch of the “4 per 1000” Initiative. Partners include developed and developing states, international organizations, private foundations, international funds, NGOs and farmers’ organizations.

The partners have agreed to reinforce their actions on appropriate soil management, recognizing the importance of soil health for the transition towards productive, highly resilient agriculture.

The “4/1000 Initiative: Soils for Food Security and Climate” aims to protect and increase carbon stocks in soils.  According to the French Agriculture Ministry, a 0.4-percent annual growth rate in soil carbon content would make it possible to stop the present increase in atmospheric CO2 and achieve the long-term objective of limiting the average global temperature increase to the 1.5°C to 2°C threshold beyond which the Intergovernmental Panel on Climate Change (IPCC) says would lead to a climate disaster.

The initiative consists of a voluntary action plan under the Lima-Paris Action Agenda (LPAA), backed by an ambitious research program.

The United Nations officially declared 2015 the International Year of the Soils, beginning on December 5, 2014, and ending on World Soil Day, December 5, 2015. The official closure took place at FAO headquarters on December 4.

IFOAM – Organics International is the worldwide umbrella organization for the organic agriculture movement, which represents close to 800 member organizations  in about 125 countries.

The Organic Consumers Association (OCA) is an online and grassroots non-profit 501(c)(3) public interest organization representing 2 million U.S. consumers campaigning for health, justice, and sustainability. The Organic Consumers Fund is a 501(c)4 allied organization of the Organic Consumers Association, focused on grassroots lobbying and legislative action.