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The Rising Cost of Delaying Climate Action

Delaying tough climate action could do more than raise the damage bill for China and the world. A new modeling study has examined the social cost of carbon and what happens when climate efforts fall short.

In the United States and many othre nations, the social cost of carbon informs government rules that assess the trade-offs of climate regulations.

Why Climate Action Gets Delayed

The work was led by Rong wang, a climate policy researcher at Fudan University in Shanghai.

Wang’s research focuses on how energy choices, climate damage, and economic behavior reinforce one another over long periods across continents.

many governments believe it’s cheaper to take weaker climate action right now.They’re assuming that as climate damage gets worse in the future, the need to cut emissions will become more obvious, and they can act more forcefully later instead of paying more upfront today.

The researchers tested this expectation and found that, in several scenarios, the incentive to cut emissions does not keep growing as damage rises.

The team used an integrated assessment model to simulate how the social cost of carbon – the estimated economic damage of each additional ton of carbon dioxide emitted – changes under different climate policy pathways.

The Problem with Waiting

The study reveals a troubling dynamic. As climate change intensifies, several factors can actually reduce the political and economic pressure to act. These include:

• Decreased economic Growth: Severe climate impacts can slow economic growth, leaving countries with fewer resources to invest in mitigation.
• Increased Adaptation spending: More money is diverted to adapting to climate change (building sea walls, developing drought-resistant crops) and less is available for preventing it.
• Discounting Future Damages: As the future looks increasingly bleak,societies may place a lower value on preventing long-term damages,prioritizing immediate needs.

This creates a dangerous feedback loop where worsening climate impacts lead to weaker climate action, accelerating the problem further.

Key Findings of the Study

the researchers found that in some scenarios, the social cost of carbon actually declines over time when climate action is delayed. This is as the factors listed above outweigh the increasing physical damages from climate change.

Specifically, they found that:

• Delaying action by just a decade can significantly increase the total cost of climate change.
• The decline in the social cost of carbon is most pronounced in regions heavily impacted by climate change, creating a perverse incentive to delay action in the most vulnerable areas.
• Strong, early climate action is crucial to avoid this dangerous dynamic and keep the social cost of carbon rising, reinforcing the incentive to decarbonize.

Implications for Policy

This research has crucial implications for climate policy. It suggests that relying on future pressure to drive climate action is a risky strategy. Governments need to act decisively now, even if it means incurring higher upfront costs.

The study highlights the importance of:

• Setting enterprising emissions reduction targets.
• Implementing policies that incentivize decarbonization.
• Investing in climate resilience and adaptation.
• Accurately accounting for the social cost of carbon in policy decisions.

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