A new study suggests that some environmental solutions could reach a point where they begin to drive their own success. Here’s what that means for IB Environmental Systems and Societies students.

When we hear the words tipping point, we usually think about something going wrong.

Climate scientists, for example, are concerned about tipping points that could cause rapid and difficult-to-reverse changes in Earth’s systems. An ice sheet starts to collapse, a coral reef becomes a much less productive ecosystem, or a tropical forest begins to lose its ability to produce enough moisture to support itself.

But what if tipping points could also work in the opposite direction?

A new report from the University of Exeter and The Earthshot Prize looks at exactly this idea. Researchers examined 51 environmental solution areas and identified five groups of solutions that could potentially create what they call positive tipping points. These are situations where progress begins to reinforce itself, making further progress easier.

The idea is directly relevant to IB ESS because it connects several major concepts in the course: systems, feedback loops, biodiversity, climate change, resource use, energy production, and sustainability.

What is a positive tipping point?

A tipping point is a threshold in a system.

Before the threshold is reached, change might be slow. But once that threshold is crossed, positive feedback can cause small changes to accelerate, moving the system away from equilibrium (that’s why we usually say that positive feedback in ecosystems is a bad thing).

It’s like a snowball rolling down a hill. At first, it’s small and moves slowly. But as it rolls, it collects more snow. The larger it becomes, the more snow it can collect, causing it to grow even faster.

Environmental systems – ecosystems – behave in similar ways.

For example, solar power was once expensive and used on a relatively small scale. As more solar panels were produced and installed, manufacturing became cheaper. Lower prices encouraged more people and businesses to buy solar panels. Greater demand encouraged more investment and production, which helped reduce costs even further.

This creates a positive feedback loop:

More solar power → lower costs → more investment → more solar power → even lower costs

Eventually, the system can reach a point where growth becomes increasingly self-sustaining.

This is different from a negative or dangerous tipping point, like the collapse of a coral reef. In that case, reinforcing feedback loops can push the ecosystem toward a less desirable, less stable, and more vulnerable state.

IB ESS connection: Systems and feedback

This is a great example of the IB ESS idea that environmental systems are made up of interacting parts.

When you’re learning about an ecosystem, ask yourself:

• What are the components of the system?
• How are the components connected?
• What feedback loops are operating?
• Is the feedback positive (reinforcing change) or negative (offsetting change)?
• What happens if/when the system passes a threshold?

The same basic systems thinking can help us understand both environmental problems and environmental solutions.

Five areas where positive tipping points could make a difference

The researchers identified five particularly important groups of solutions.

1. Clean electricity could create a “master cascade”

The first and most important area is the transition from fossil fuels to clean electricity, especially solar and wind power.

According to the report, solar and wind have already reached positive tipping points in several markets. As renewable energy becomes cheaper and more widely available, it can make other changes easier.

For example, cheap renewable electricity can help increase the use of:

• electric vehicles
• heat pumps
• electric heating
• cleaner industrial processes
• other forms of electrification

This means that changing the energy system can affect many other environmental systems.

The researchers therefore describe clean electricity as a “master cascade.”

IB ESS connection: Climate change and energy production

This connects directly to Topic 6: Climate change and Topic 7: Energy production.

Fossil fuels release carbon dioxide when they are burned. Carbon dioxide is a greenhouse gas, so continued dependence on coal, oil and natural gas contributes to climate change.

Renewable energy can reduce greenhouse gas emissions from the generation of electricity. But there’s an important systems idea here:

Changing the energy system can cause changes in other systems.

For example:

More renewable electricity → more electric vehicles → less petrol and diesel use → lower fossil-fuel demand → lower greenhouse gas emissions

The transition also shows why energy choices aren’t just technological decisions. Electricity grids, government policies, investment, access to technology and consumer behavior all affect the system.

The Exeter report also identifies a major problem: investment in clean energy isn’t evenly distributed around the world. Africa has some of the world’s best solar resources but receives less than 2% of global clean-energy investment.

This raises an important ESS question, and it’s one that links closely to the HL lenses of Environmental Ethics and Environmental Economics:

Is an environmental solution really sustainable if some populations cannot afford or access it?

2. Clean cooking could improve both health and the environment

Around 2.1 billion people still rely on solid fuels for cooking. These fuels can include wood, charcoal and other forms of biomass.

Burning these fuels indoors can produce large amounts of air pollution, including very small particles called PM₂.₅. These particles can enter deep into the lungs.

Burning solid fuels can also produce black carbon, commonly called soot.

Cleaner cooking technologies, including electric cooking and other cleaner fuels, can therefore provide both environmental and health benefits.

The report suggests that clean cooking is approaching a positive tipping point in some countries because of technologies such as pay-as-you-go solar systems and expanding electricity access.

IB ESS connection: Atmospheric systems and society

This connects directly to ESS Topic 6: Atmospheric systems.

ESS students study different types of air pollution and their effects on human health and ecosystems.

This example also demonstrates that environmental problems are often connected.

A cooking technology can affect:

Energy use → air pollution → human health → greenhouse gas emissions → climate change

There is also an important social dimension.

A technology may exist, but that does not mean everyone can use it. For a positive tipping point to occur, the solution needs to be:

Affordable + Accessible + Attractive

These three conditions appear throughout the researchers’ analysis.

3. Protecting the oceans can create a positive feedback loop

Another important example involves marine protected areas, or MPAs.

An MPA is an area of the ocean where human activities are restricted or managed to protect marine ecosystems.

When MPAs are well designed and properly enforced, fish populations and biodiversity can recover.

That recovery can benefit local communities through:

• increased fish populations
• improved food security
• healthier ecosystems
• greater resilience to environmental change

And this can create another feedback loop.

Healthy ocean → more fish → benefits for communities → greater support for protection → more protected areas → healthier ocean

The researchers describe this as an example of a positive tipping point.

IB ESS connection: Biodiversity and conservation

This connects directly to Topic 3: Biodiversity and conservation.

Marine protected areas are an example of in situ conservation because organisms are protected within their natural ecosystems.

They also demonstrate why biodiversity matters.

A diverse ecosystem may be better able to respond to environmental change because it contains many different species performing different ecological roles.

However, simply drawing a line on a map does not guarantee conservation success.

An MPA must be:

• well designed
• properly managed
• monitored
• enforced
• supported by local communities

This is an important ESS lesson:

Conservation isn’t only about protecting ecosystems. It’s also about managing human systems.

4. Changing global supply chains could slow tropical deforestation

Tropical forests are under pressure from activities such as cattle ranching, agriculture and logging.

The report highlights several products that are connected to deforestation, including:

• beef
• soy
• palm oil
• timber
• cocoa
• coffee

A small number of companies and financial institutions have enormous influence over these global supply chains.

This makes them important gatekeepers.

For example, if major companies require their suppliers to prove that their products have not caused deforestation, producers could have a strong economic reason to change their practices.

Government regulations can strengthen that process.

The report highlights the EU Deforestation Regulation as an example of legislation that was designed to prevent products linked to deforestation from entering the European market.

IB ESS connection: Biodiversity, ecosystems and resource use

This connects to several parts of IB ESS.

First, tropical forests contain extremely high levels of biodiversity. Destroying them can cause habitat loss and species decline.

Second, forests provide important ecosystem services, including carbon storage, water regulation and soil protection.

Third, this is an example of resource use.

Humans depend on forests and agricultural land for food and materials. The challenge is finding ways to meet human needs without destroying the ecosystems that provide those resources.

This is also an excellent example of the tragedy of the commons and the difficulty of managing resources when many different groups have competing interests.

5. Climate adaptation could also become self-reinforcing

The fifth major area is slightly different.

Instead of preventing environmental change, adaptation means reducing the harmful effects of environmental change.

Examples include:

• flood protection
• early-warning systems
• climate-resilient buildings
• improved water management
• climate-resilient health systems

Imagine that a community builds a flood defense system.

If the system successfully reduces flood damage, people and governments might become more willing to invest in similar projects. Investors may see the community as less risky. Insurance costs could fall. More money would then become available for additional improvements.

That’s another positive feedback (especially for HL Environmental Economics):

Adaptation → fewer losses → greater confidence → more investment → more adaptation

The report suggests that adaptation could therefore become self-reinforcing rather than being treated only as a continuing cost.

IB ESS connection: Climate change and sustainability

This connects again to Topic 6: Climate change and Topic 7.2 energy production.

Students should be able to distinguish between:

Mitigation – reducing the causes of climate change.

Adaptation – reducing the effects of climate change.

For example:

Mitigation	Adaptation
Solar power	Flood barriers
Wind power	Drought-resistant crops
Energy efficiency	Early-warning systems
Reducing methane emissions	Climate-resilient buildings
Protecting forests	Water-storage systems

In reality, societies need both.

Why feedback loops matter

I think the most important idea in this research isn’t any single technology or policy.

It’s the idea of feedback.

Many environmental problems contain reinforcing positive feedback loops that make the problem worse.

For example:

Global warming → melting ice → less sunlight reflected by Earth → more solar energy absorbed → more warming

This is a positive feedback loop, but it has a negative effect on people and ecosystems.

The new research asks whether we can deliberately create reinforcing feedback loops that move systems in the opposite direction.

For example:

More solar power → lower costs → greater demand → more investment → more solar power

The same basic systems principle can therefore produce very different outcomes depending on the direction of change.

The three conditions for a positive tipping point

The researchers identify three conditions that are important across all five areas:

1. Affordable

People and organizations need to be able to afford the solution.

2. Accessible

The technology or practice must actually be available to the people who need it.

3. Attractive

People need a reason to choose it. It has to work well, provide benefits and be socially acceptable.

This is an important reminder that technology alone can’t solve environmental problems.

A solar panel may be highly efficient, but it won’t solve a community’s energy problems if people can’t afford it.

A marine protected area may protect biodiversity, but it will fail if local communities can’t make a living.

A clean cooking stove may reduce air pollution, but it won’t be adopted if it doesn’t meet people’s cooking needs.

Environmental solutions must therefore work within social, economic and political systems. That ties into the models of sustainability in ESS topic 1.3.

What does this mean for the future?

The research doesn’t mean that the environmental crisis is solved.

In fact, Exeter’s researc team emphasizes that many dangerous environmental tipping points remain a serious threat.

Instead, the research offers a different way of thinking about environmental action.

We often assume that solving environmental problems requires continuously increasing effort.

The idea of positive tipping points suggests another possibility:

Get a system to the point where the solution begins to reinforce itself.

That could mean:

• renewable energy becoming cheaper as more people use it
• ecosystems recovering and creating support for further conservation
• companies competing to produce deforestation-free products
• clean cooking becoming easier and cheaper to adopt
• successful climate adaptation encouraging further investment

The researchers identified 51 priority solution areas across five broad environmental goals: protecting and restoring nature, cleaning the air, reviving the oceans, building a waste-free world and addressing climate change.

The five areas discussed above are therefore not the only solutions. They’re the areas that the researchers believe have particularly strong potential to create wider, self-reinforcing change.

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What should IB ESS students take away from this?

This story is a useful example of why Environmental Systems and Societies is a systems course.

Environmental problems rarely exist in isolation.

Energy affects climate.

Climate affects ecosystems.

Ecosystems affect food production.

Food production affects land use.

Land use affects biodiversity.

Human decisions affect all of these systems.

The most effective solutions can work in the same interconnected way.

A reason for cautious optimism

Environmental science often focuses on what’s going wrong.

There are many reasons for this. Climate change, biodiversity loss, pollution and resource depletion are serious problems.

But understanding environmental systems also allows us to identify opportunities for positive change.

The concept of positive tipping points does not mean that we can simply wait for the planet to fix itself.

Quite the opposite.

The goal is to identify where a relatively small amount of well-designed action can trigger much larger changes.

For IB ESS students, that may be the most important lesson of all:

Environmental systems can change rapidly when feedback mechanisms become powerful enough. Our challenge is to understand those systems well enough to encourage positive change before dangerous tipping points are reached.

Happy learning!