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).
Luis Martinez, Leila Niamir, Aneeque Javaid, Keith Smith, Joshua E. Buxton, Aileen Lam, Caroline Zimm, Tom Powell
Luis Martinez, Leila Niamir, Aneeque Javaid, Keith Smith, Joshua E. Buxton, Aileen Lam, Caroline Zimm, Tom Powell
The transport sector is one of the most difficult to decarbonise, currently still relying almost entirely on fossil fuels for individual motorised transport. While individual technologies such as electric vehicles (EVs) show promising acceleration in their diffusion to support decarbonisation of this sector, transport demand is ever increasing. Merely switching to a new technology for passenger vehicles will not transform our mobility in a sufficiently sustainable manner as other externalities will prevail and material demand will remain high. Aiming to avoid demand for material-intensive mobility and shifting to more active modes of transport play a key role in transforming this sector. Examples of successful initiatives that moved towards more active mobility modes, such as walking and cycling, and higher-capacity technologies, are given with a focus on passenger mobility in cities. Bus Rapid Transit Systems are low cost and high impact and have been replicated in some cases both in Global North and Global South contexts. An example of how freight transport could be transformed is also given.