World warned it faces tipping point for six systemic risks

A new report has warned the world is in danger of experiencing a series of significant shocks as a range of emerging risks reach their tipping points.

The study by the United Nations University – Institute for Environment and Human Security (UNU-EHS) report found that drastic changes are approaching if risks to our fundamental socioecological systems are not addressed.

The Interconnected Disaster Risks report 2023 warned of six risk tipping points the world will face in the future:

  • Accelerating extinctions
  • Groundwater depletion
  • Mountain glaciers melting
  • Space debris
  • Unbearable heat
  • Uninsurable future

The report explained systems are around us and are closely connected to us: ecosystems, food systems, water systems and more. When they deteriorate, it is typically not a simple and predictable process. Rather, instability slowly builds until suddenly a tipping point is reached and the system changes fundamentally or even collapses, with potentially catastrophic impacts.

A risk tipping point is defined in the report as the moment at which a given socioecological system is no longer able to buffer risks and provide its expected functions, after which the risk of catastrophic impacts to these systems increases substantially. These diverse cases illustrate that risk tipping points extend beyond the single domains of climate, ecosystems, society or technology. Instead, they are inherently interconnected, and they are also closely linked to human activities and livelihoods.

“Many new risks emerge when and where our physical and natural worlds interconnect with human society,” the report. “One example of a risk tipping point is groundwater depletion. Underground water reservoirs called aquifers are an essential freshwater resource around the world, and they supply drinking water to over 2 billion people. Around 70 per cent of groundwater withdrawals are used for agriculture, oftentimes when there is not sufficient water from above-ground sources available.

“Today, aquifers help to mitigate half of the losses in agriculture caused by drought, a phenomenon which is only expected to increase in the future due to climate change.”

But the report warns that now it’s the aquifers themselves that are approaching a tipping point: More than half of the world’s major aquifers are being depleted faster than they can be naturally replenished. If the water table falls below a level that existing wells can access, farmers can suddenly find themselves without the ability to access water, which puts entire food production systems at risk of failure. Some countries, such as Saudi Arabia, have already surpassed this groundwater risk tipping point; others, like India, are not far from it.

“As we indiscriminately extract our water resources, damage nature and biodiversity, and pollute both Earth and space, we are moving dangerously close to the brink of multiple risk tipping points that could destroy the very systems that our life depends on,” said Dr Zita Sebesvari, lead author of the report and deputy director of UNU-EHS. “Additionally, we also lose some of our tools and options to deal with future disaster risk.”

The analysis reveals that the cases share similar root causes and drivers which are embedded in our actions and behaviours that increasingly put pressure on our systems until they are pushed to the brink of collapse. Reaching these points means new risks will be introduced, many of which we do not yet know.

“As we approach these tipping points, we will already begin to experience the impacts. Once crossed, it will be difficult to go back,” warned Dr Jack O’Connor, lead author and senior expert at UNU-EHS. “Our report can help us see risks ahead of us, the causes behind them and the urgent changes required to avoid them.”

The report added solutions fall into two categories: Avoid solutions, which target root causes and drivers of risk to avoid risk tipping points altogether, and Adapt solutions, which help prepare or better address the negative impacts of risk tipping points if they cannot be avoided.

“For both Avoid and Adapt solutions, there are two types of actions,” it explained. “Delay actions work within the existing ‘business as usual’ system and aim to slow down the progression toward risk tipping points or the worst impacts. But the ideal action is to Transform, which involves a fundamental reimagining of a system into something stronger and more sustainable than before.

In the case of the ‘Unbearable heat’ risk tipping point, it is human-induced climate change that is causing a global rise in temperatures, leading to more frequent and intense heatwaves that will in some areas reach temperatures in which the human body can no longer survive.”

“Real transformative change involves everyone,” said Sebesvari. “The report serves as a timely reminder before the UN Climate Conference that we must all be part of the solution.”