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).
Guided by these challenges and the principles introduced in Chapter 3.1, especially anticipation, polycentricity/multi-scale governance, systemic risk governance, and equity and justice, here we explore where and how impact governance related to ESTPs could take place. We begin with a discussion of multiple objectives of impact governance and how to prioritise these (3.3.3.1). Sub-section 3.3.3.2 applies the concept of polycentricity to ESTP impact governance, including the need for diversity, redundancy and flexibility in response capacity. We use examples from the UNFCCC (adaptation, loss and damage) and international migration, to illustrate opportunities and challenges in the existing landscape of governance institutions, especially at the global scale. We consider cascade prevention from a systemic risk governance perspective in 3.3.3.3 and the need to generate reliable early warning signals and systems in 3.3.3.4. Finally, we discuss equity and justice implications for future impact governance efforts (3.3.3.5). This is a domain where the social science knowledge and evidence base is particularly thin, and our discussion is to a large extent speculative.