In the waning hours of the year’s biggest climate change conference – COP27 – we learned of a deal to create a loss and damage fund. This is essentially a source of finance to compensate poor countries for the pain they are incurring because of climate change. An often-cited example of such suffering is the ongoing drought in the Horn of Africa region, which has put some 22 million people at risk of severe hunger. While some have heralded this agreement as long overdue climate reparations, others point out that the loss and damage fund does nothing to address the root causes of climate change – fossil fuel emissions.
Here I seek to raise a different concern: this approach glosses over the fact that the types of food production systems that the global community has fostered in Africa leave the poorest more exposed and vulnerable to climatic variability and economic shocks. These food production systems refer to the ways people produce, store, process and distribute food, as well as the inputs into the system along the way.
Historically smallholder and women farmers have produced the lion’s share of food crops on the African continent. Over the past 60 years, global decision makers, big philanthropy, business interests and large swaths of the scientific community have focused on increased food production, trade, and energy intensive farming methods as the best way to address global and African hunger.
This approach to addressing hunger has failed to address food insecurity on the continent. Moderate to severe food insecurity affects nearly 60% of Africans today. It’s also resulted in food systems that are now more vulnerable to climate change. The idea that the solution is to produce more dates back to the colonial period. It’s bad for the global environment, highly vulnerable to climate and energy shocks, and does not feed the poorest of the poor. I approach this topic as a nature-society geographer who has spent his career studying agricultural development approaches and food systems in west and southern Africa. Through this work, I have come to see agroecology as more accessible to the poorest.
Vulnerable food systems
Each time there has been a global food crisis, variations on the formula of increased agricultural production, trade and energy intensive farming methods have been the favoured solution. These include the first Green Revolution of the 1960s-1970s, commodity production and trade in the 1980s-1990s, the New Green Revolution for Africa and public-private partnerships in the 2000s-2010s.
Many scholars now understand that food security has six dimensions, of which only one is addressed by food production.
Looking at all six dimensions reveals the complex drivers of hunger. These include:
food availability – local production and net imports
access – the ability of households to acquire food that is available
utilization – the cooking, water and sanitation facilities needed to prepare healthy food
stability of food prices and supplies over time
sustainability – the ability to produce food without undermining the resource base
agency – people’s ability to control their food systems, from production to consumption.
Decolonizing African agriculture
Certain countries and businesses profit from productionist approaches to addressing hunger. These include, for example, Monsanto, which developed the herbicide Round-Up. Or the four companies (Archer-Daniels-Midland, Bunge, Cargill and Louis Dreyfus) that control 70%-90% of the global grain trade.
The productionist focus is also engrained in the agricultural sciences. Tropical agronomy, now known as “development agronomy”, was central to the colonial enterprise in Africa. The main objective for colonial powers was to transform local food systems. This pushed many African households away from subsistence farming and the production of food for local markets. Instead, they moved towards the cultivation of commodity crops needed to fuel European economic expansion, such as cotton in Mali, coffee in Kenya, and cacao in Côte d’Ivoire.
While forced labour was employed in some instances, head taxes became the preferred strategy in many cases for facilitating commodity crop production. Forced to pay such taxes in cash or face jail time, African farmers begrudgingly started to produce cash crops, or went to work on nearby plantations.
Loss of risk management practices
Accompanying the transition to commodity crop production was a gradual loss of risk management practices like storage of surplus grain. Many farmers and herders in Africa have had to deal with highly variable rainfall patterns for centuries. This makes them some of the foremost experts on climate change adaptation. Farmers would also plant a diverse range of crops with different rainfall requirements. Herders moved across large areas in search of the best pastures.
Many problematic approaches have continued in the post-colonial period. Various international and national policies and programmes have encouraged African farmers to produce more crops, using imported seeds, pesticides and fertilisers in the name of development or hunger alleviation. Even though African farmers may be producing more, they are left exposed to the ravages of variable climatic conditions.
Agroecology and the way forward
Agroecologists can offer a different way forward. They seek to understand the ecological interactions between different crops, crops and the soil and atmosphere, and crops and insect communities. They seek to maintain soil fertility, minimise predation from pests and grow more crops without using chemical inputs.
Agroecologists often collaborate with and learn from farmers who have developed such practices over time and are in tune with local ecologies. This combination of experiential knowledge and formal science training makes agroecology a more decolonial science. It is also more accessible to the poor because there’s no need to buy expensive inputs or risk becoming indebted when crops fail.
The fact that agroecological farming is less expensive has not been lost on the business community. They would lose out substantially if conventional farming approaches were no longer associated with hunger alleviation. Furthermore, those in the agricultural sciences who have supported productionist approaches to hunger alleviation also see agroecology as a threat as it could lead to a decline of prestige and research funding. There are signs that the global community may be on the cusp of a major shift in thinking with regard to food systems, climate change and hunger.
A global food crisis has led some to question why previous solutions have not worked. We also now have an emerging, more decolonial science of agroecology that is increasingly accepted within the United Nations system. It’s backed by a powerful social movement that refused to back down when corporate agricultural interests tried to hijack the 2021 UN Food Systems Summit.
In some cases, there are also large institutional donors experimenting with agroecological approaches, something almost unheard of a decade ago. Lastly, there is a new set of leaders within some African governments who understand what agroecology offers. The ravages of climate change and hunger do not occur in isolation, but are part of the system we have built. That means we can build something different. The current crisis lays bare this problem and the right combination of new ideas, resources and political will can solve it.
DeWitt Wallace is Professor of Geography, Director of Food, Agriculture & Society Program, Macalester College
The theme of this year’s Earth Day is “Planet vs. Plastics” – a theme chosen to raise awareness of the damage done by plastic to humans, animals and the planet and to promote policies aiming to reduce global plastic production by 60 percent by 2040.
As our chart shows, global plastics use has increased rapidly over the past few decades, growing 250 percent since 1990 to reach 460 million tonnes in 2019, according to the OECD’s Global Plastics Outlook, which projects another 67-percent increase in global plastics use by 2040 and for the world’s annual plastic use to exceed one billion tonnes by 2052. As our chart shows, packaging is the largest driver of global plastics use, which is why a rapid phasing out of all single use plastics by 2030 is one of the policy measures proposed under EARTHDAY.ORG’s 60X40 framework.
Other major applications of plastics include building and construction, transportation as well as textiles, with the fast fashion industry particularly guilty of adding to the world’s plastic footprint. “The fast fashion industry annually produces over 100 billion garments,” the Earth Day organizers write. “Overproduction and overconsumption have transformed the industry, leading to the disposability of fashion. People now buy 60 percent more clothing than 15 years ago, but each item is kept for only half as long.” Most importantly, the organization points out that 85 percent of disposed garments end up in landfills or incinerators, while just 1 percent are being recycled.
Felix Richter is a Data Journalist
This article was first published in the Statista.com.
Algeria’s Tassili N’Ajjer plateau is Africa’s largest national park. Among its vast sandstone formations is perhaps the world’s largest art museum. Over 15,000 etchings and paintings are exhibited there, some as much as 11,000 years old according to scientific dating techniques, representing a unique ethnological and climatological record of the region.
Curiously, however, these images do not depict the arid, barren landscape that is present in the Tassili N’Ajjer today. Instead, they portray a vibrant savannah inhabited by elephants, giraffes, rhinos and hippos. This rock art is an important record of the past environmental conditions that prevailed in the Sahara, the world’s largest hot desert.
These images depict a period approximately 6,000-11,000 years ago called the Green Sahara or North African Humid Period. There is widespread climatological evidence that during this period the Sahara supported wooded savannah ecosystems and numerous rivers and lakes in what are now Libya, Niger, Chad and Mali.
This greening of the Sahara didn’t happen once. Using marine and lake sediments, scientists have identified over 230 of these greenings occurring about every 21,000 years over the past eight million years. These greening events provided vegetated corridors which influenced species’ distribution and evolution, including the out-of-Africa migrations of ancient humans.
These dramatic greenings would have required a large-scale reorganisation of the atmospheric system to bring rains to this hyper arid region. But most climate models haven’t been able to simulate how dramatic these events were.
As a team of climate modellers and anthropologists, we have overcome this obstacle. We developed a climate model that more accurately simulates atmospheric circulation over the Sahara and the impacts of vegetation on rainfall.
We identified why north Africa greened approximately every 21,000 years over the past eight million years. It was caused by changes in the Earth’s orbital precession – the slight wobbling of the planet while rotating. This moves the Northern Hemisphere closer to the sun during the summer months.
This caused warmer summers in the Northern Hemisphere, and warmer air is able to hold more moisture. This intensified the strength of the West African Monsoon system and shifted the African rainbelt northwards. This increased Saharan rainfall, resulting in the spread of savannah and wooded grassland across the desert from the tropics to the Mediterranean, providing a vast habitat for plants and animals.
Our results demonstrate the sensitivity of the Sahara Desert to changes in past climate. They explain how this sensitivity affects rainfall across north Africa. This is important for understanding the implications of present-day climate change (driven by human activities). Warmer temperatures in the future may also enhance monsoon strength, with both local and global impacts.
Earth’s changing orbit
The fact that the wetter periods in north Africa have recurred every 21,000 years or so is a big clue about what causes them: variations in Earth’s orbit. Due to gravitational influences from the moon and other planets in our solar system, the orbit of the Earth around the sun is not constant. It has cyclic variations on multi-thousand year timescales. These orbital cycles are termed Milankovitch cycles; they influence the amount of energy the Earth receives from the sun.
On 100,000-year cycles, the shape of Earth’s orbit (or eccentricity) shifts between circular and oval, and on 41,000 year cycles the tilt of Earth’s axis varies (termed obliquity). Eccentricity and obliquity cycles are responsible for driving the ice ages of the past 2.4 million years.
The third Milankovitch cycle is precession. This concerns Earth’s wobble on its axis, which varies on a 21,000 year timescale. The similarity between the precession cycle and the timing of the humid periods indicates that precession is their dominant driver. Precession influences seasonal contrasts, increasing them in one hemisphere and reducing them in another. During warmer Northern Hemisphere summers, a consequent increase in north African summer rainfall would have initiated a humid phase, resulting in the spread of vegetation across the region.
Eccentricity and the ice sheets
In our study we also identified that the humid periods did not occur during the ice ages, when large glacial ice sheets covered much of the polar regions. This is because these vast ice sheets cooled the atmosphere. The cooling countered the influence of precession and suppressed the expansion of the African monsoon system.
The ice ages are driven by the eccentricity cycle, which determines how circular Earth’s orbit is around the sun. So our findings show that eccentricity indirectly influences the magnitude of the humid periods via its influence on the ice sheets. This highlights, for the first time, a major connection between these distant high latitude and tropical regions.
The Sahara acts as a gate. It controls the dispersal of species between north and sub-Saharan Africa, and in and out of the continent. The gate was open when the Sahara was green and closed when deserts prevailed. Our results reveal the sensitivity of this gate to Earth’s orbit around the sun. They also show that high latitude ice sheets may have restricted the dispersal of species during the glacial periods of the last 800,000 years.
Our ability to model the African humid periods helps us understand the alternation of humid and arid phases. This had major consequences for the dispersal and evolution of species, including humans, within and out of Africa. Furthermore, it provides a tool for understanding future greening in response to climate change and its environmental impact.
Refined models may, in the future, be able to identify how climate warming will influence rainfall and vegetation in the Sahara region, and the wider implications for society.
Edward Armstrong is a postdoctoral research fellow, University of Helsinki
A new draft text on global stocktake has been published at the UN climate summit, COP28 UAE, on Wednesday morning. While the draft text does not contain the words “phase out”, it includes reference to transitioning away from all fossil fuels to enable the world to reach net zero by 2050.
The text published by the UN’s climate body calls on parties to accelerate and substantially reduce non-carbon dioxide emissions worldwide with a focus on reducing methane emissions by 2030. “We all want to get the most ambitious outcome possible,” Majid Al Suwaidi, COP28 Director-General, said on Tuesday.
The text, published early Wednesday, does not specifically refer to oil, but mentions the need to ‘phase-down’ coal. It says that it recognises the need for ‘deep, rapid and sustained reductions in greenhouse gas emissions in line with 1.5C pathways and calls on Parties to contribute to global efforts.
Among those efforts it recognises the need to triple renewable energy capacity by 2030 and doubling the annual rate of energy efficiency improvements by the same date. It also recognises the need to accelerate the phase-down of coal and accelerate towards net zero energy systems, utilising zero or low carbon fuels by mid century.
While the document does not mention oil or combustion engines, it does recognises the need for accelerating the reduction of emissions from road transport on a range of pathways, including through development of infrastructure and rapid deployment of zero and low-emission vehicles. It also recognises the need to phase out inefficient fossil fuel subsidies that do not address energy poverty or just transitions, as soon as possible.
Finance specifics
On the subject of finance, the document said developed countries should continue to take the lead in mobilising climate finance from a wide variety of sources, instruments and channels, noting the significant role of public funds, through a variety of actions, including supporting country-driven strategies, and taking into account the needs and priorities of developing countries.
Such mobilisation of climate finance should represent a progression beyond previous efforts, the text said. It may provide small comfort to campaigners from developing countries who implored Parties to begin the phase out of fossil fuels and provide vastly improved access to funding for renewables.
The document highlights the persistent gap and challenges in technology development and transfer and the uneven pace of adoption of climate technologies around the world.
It further urges Parties to address these barriers and strengthen cooperative action, including with non-Party stakeholders, particularly with the private sector, to rapidly scale up the deployment of existing technologies, the fostering of innovation and the development and transfer of new technologies.
It also emphasizes the ongoing challenges faced by many developing country Parties in accessing climate finance and encourages further efforts, including by the operating entities of the Financial Mechanism, to simplify access to such finance, in particular for those developing country Parties that have significant capacity constraints, such as the least developed countries and small island developing States.
