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).
Governments must step up to address inequality through improved legal and fiscal policy (Green, 2021). Domestic fiscal policy needs to subsidise or compensate lower-income households for the higher costs that accompany regulations like carbon pricing, emissions trading and new standards. Failure to do so could set off a cascade of unintended consequences and increase poverty, inequality and other impacts like popular protest and political instability. Legal mechanisms to ensure procedural, reparative and distributive justice are also imperative. PTPs require intervening in complex systems that we do not fully understand. Policymaking therefore needs to become more flexible and anticipatory, and include the ability to correct for unintended consequences. Such anticipatory governance mechanisms could include ringfencing funding to support unintended consequences as well as ongoing review of policy interventions to assess their effectiveness and equity and allow for a change of direction if necessary. Policy and governance actors attracted to positive social tipping interventions should also recognise that research is constantly updating and so there is a need to be aware of hidden assumptions, biases and potential for backfires, rebounds and other unwelcome results (Sterman, 2002).