Harmful tipping points in the natural world pose some of the gravest threats faced by humanity. Their triggering will severely damage our planet’s life-support systems and threaten the stability of our societies.
In the Summary Report:
• Narrative summary
• Global tipping points infographic
• Key messages
• Key Recommendations
Executive summary
• Section 1
• Section 2
• Section 3
• Section 4
This report is for all those concerned with tackling escalating Earth system change and mobilising transformative social change to alter that trajectory, achieve sustainability and promote social justice.
In this section:
• Foreword
• Introduction
• Key Concepts
• Approach
• References
Considers Earth system tipping points. These are reviewed and assessed across the three major domains of the cryosphere, biosphere and circulation of the oceans and atmosphere. We then consider the interactions and potential cascades of Earth system tipping points, followed by an assessment of early warning signals for Earth system tipping points.
Considers tipping point impacts. First we look at the human impacts of Earth system tipping points, then the potential couplings to negative tipping points in human systems. Next we assess the potential for cascading and compounding systemic risk, before considering the potential for early warning of impact tipping points.
Considers how to govern Earth system tipping points and their associated risks. We look at governance of mitigation, prevention and stabilisation then we focus on governance of impacts, including adaptation, vulnerability and loss and damage. Finally, we assess the need for knowledge generation at the science-policy interface.
Focuses on positive tipping points in technology, the economy and society. It provides a framework for understanding and acting on positive tipping points. We highlight illustrative case studies across energy, food and transport and mobility systems, with a focus on demand-side solutions (which have previously received limited attention).
As stated in Figure 4.2.3 and Table 4.2.1, agents can strategically intervene to encourage a PTP to emerge, by: a) creating enabling conditions; b) enhancing reinforcing feedbacks and neutralising dampening feedbacks; and c) providing the decisive trigger that pushes the system past its tipping point. Interventions can also be sequenced to create positive synergies – from innovation-oriented interventions that enjoy more political support to more controversial phase-out policies (Fesenfeld et al., 2022).
Table 4.2.1: Strategic interventions for triggering PTPs (Lenton et al., 2022).
The three symbols correspond to those in Figure 4.2.3.
Create enabling conditions | Increase reinforcing feedbacks; Reduce dampening feedbacks | Trigger positive tipping |
Target smaller populations. Change social network structure. Provide information. Reduce price/cost. Improve performance and quality. Increase desirability or symbolism. Improve accessibility. Increase convenience. Coordinate complementary technologies. | Social contagion. Increasing returns to adoption: • Learning by doing • Economies of scale • Technological reinforcement Network effects. Information cascades. Percolation. Co-evolution. Ecological positive feedbacks. Social-ecological positive feedbacks. | Social innovation. Technological innovation. Ecological intervention. Social-ecological technologies. Policy intervention and public investment. Private investment and markets. Public information. Behavioural nudges. |