Some advocate for banning essential geoengineering research, a move that could be catastrophic. This stance is particularly concerning given the urgency of the climate crisis. A few months ago, Marjorie Taylor Greene, a former Georgia representative, held a hearing on her bill to ban research on geoengineering, a term encompassing technological climate interventions like using reflective particles to block sunlight. This hearing marked a significant moment as a Republican raised concerns about human activities impacting the planet's health. While burning fossil fuels for centuries has led to greenhouse gas emissions, causing global warming, the debate now revolves around deliberate interventions to cool the planet and support the energy transition. However, some view this discussion as taboo, with anti-vaxxers and chemtrail conspiracy theorists pushing for research criminalization. This resistance raises questions about the necessity of tools beyond mitigation. Two critical truths underscore the need to reject geoengineering research bans and reevaluate climate strategies. Firstly, the Earth's climate system is more sensitive to greenhouse gases than initially thought. Secondly, we are not reducing these gases fast enough. The urgency of research on alternative solutions is now greater than ever. The consequences of inaction are dire, with catastrophic impacts and dangerous feedback loops becoming more probable. Despite this, we continue to plan as if business as usual is acceptable. The challenge of addressing climate change was already formidable, even before federal attacks on climate regulations and research. As seasoned climate advocates and former public officials, we advocate for a more transparent dialogue about the future and the actions required to prepare for it. Our collective experience in emissions reduction and clean-energy policy has taught us that mitigation is crucial and must accelerate. However, the belief that mitigation alone will be sufficient is no longer valid. We have already altered the planet through greenhouse gas emissions, disrupting its energy balance, triggering feedback loops, and pushing key systems to the brink. In essence, we have inadvertently geoengineered the climate without intention or consideration of the consequences. Scientists, including James Hansen, a pioneer in climate science, are increasingly alarmed. They warn that the likelihood of a much hotter Earth is accelerating. The planet is darkening due to heat-trapping gases, disappearing reflective ice, shifting clouds, and increasing particulate pollution. The risks of irreversible damage are mounting. We would never stand idly by if this threat were any other scale, yet our global strategy beyond hoping for faster mitigation is inadequate. We are not being honest with ourselves or the public about our preparedness for worst-case scenarios. Holistic planning to manage these risks and drive energy transition and land-use reform is not a luxury but a necessity. Cutting greenhouse gases remains the long-term solution, and there are positive signs of progress in constraining the growth rate of human-made emissions. However, we started late, and our changing climate may disrupt natural carbon cycles, reducing our ability to mitigate dangerous impacts. A broader, more inclusive plan is required. This includes expanding investments in adaptation, resilience, and emergency preparedness. It also involves carefully exploring potential interventions to reduce peak warming or slow dangerous feedback loops. Rejecting research dismantling efforts when answers are most needed is crucial. Some ideas, like reflecting sunlight with particles or brightening marine clouds, could be temporary solutions to buy time and prevent catastrophic consequences. We must develop credible options, discard ineffective ones, and mature those with potential. We do not advocate for deploying any climate intervention but emphasize the importance of knowing our options for informed policy decisions. A serious research program is essential for the world to make real choices. Shutting down inquiry means closing the door to knowledge needed to distinguish reckless from responsible actions. The alternative is dire: a future where decisions are made in crisis, under pressure, and without preparation. Some argue that discussing climate interventions creates a moral hazard. However, refusing to consider life-saving options is not moral clarity but moral failure. Climate justice demands protecting people from suffering, requiring a plan integrating mitigation, adaptation, and risk reduction. This work is inevitable, and the question is when and who will undertake it. Currently, we have a window to shape these strategies safely, justly, and globally inclusively. More leaders, funders, and governments must engage, not to replace existing strategies but to complement and complete them. Dismissing ideas is easy; the challenging task is to identify effective approaches and prepare for an escalating crisis. This is a call to action for all stakeholders to contribute to a sustainable future.
