Geoengineering: Assessing Risks in the Era of Planetary Security
Publisher: Carnegie Endowment for International Peace
Author(s): Olivia Lazard, Mandi Bissett, and James Dyke
Date: 2025
Topics: Climate Change, Governance
The 1.5° Celsius global warming threshold that climate scientists have warned against for decades has been breached for several consecutive months over the last two years. This page-turning moment marks humanity’s entry into climate overshoot. At the same time, a set of radical solutions known as geoengineering is increasingly presented as a potential emergency remedy to climate breakdown. Geoengineering technologies are intentional interventions in the Earth system that aim to lessen the impacts of climate change and even reverse increases in global temperatures. These technologies represent a significant shift in approach to both climate action and global security.