How Are BCG & Cambridge University Creating Climate Action?

Governments, businesses and communities worldwide are already feeling the economic consequences of climate change. 

The frequency of extreme weather events, rising sea levels and disruptions to supply chains threaten global economic stability. 

A new report by the University of Cambridge’s climaTRACES Lab (UCCTL), Cambridge Judge Business School (CJBS) and Boston Consulting Group (BCG) outlines the pressing economic rationale for climate action and how to drive decision-making today.

The toll of inaction

Global warming has accelerated at an alarming rate, with 2024 recorded as the hottest year on record. 

Current policies project a temperature increase of 3°C by 2100, which could reduce cumulative global economic output by 15% to 34%. 

Such a trajectory would weaken productivity, damage capital stock and create significant financial instability. 

The economic damages of climate change are often underestimated due to the limitations of current models, which fail to fully account for tipping points such as coral reef extinction or Amazon forest dieback. 

Rapid and sustained investment in mitigation and adaptation could significantly reduce these damages and generate high economic returns.

Investing in mitigation and adaptation is not just an ethical imperative – it makes economic sense. 

The report estimates that limiting global warming to below 2°C will require investments amounting to 1- 2% of cumulative economic output by 2100. 

However, the cost of inaction, factoring in economic damage, could range from 11- 27% of cumulative GDP – the potential savings far exceed the upfront costs.

Mitigation efforts, such as cutting emissions and increasing energy efficiency, offer a high return on investment. 

Adaptation measures, such as flood defences and drought-resistant crops, are also necessary to shield economies from unavoidable climate impacts.

"Research on climate change impacts across all regions and sectors is expanding rapidly," explains Kamiar Mohaddes, Associate Professor in Economics and Policy at Cambridge Judge Business School and Director of the UCCTL.

"What stands out is that productivity loss—not merely capital destruction—is the primary driver of economic damage. It is also clear that climate change will reduce income in all countries and across all sectors, affecting industries ranging from transport to manufacturing and retail, not only agriculture and other sectors commonly associated with nature."

Overcoming barriers to climate action

Despite the clear economic case, progress remains slow due to five key barriers:

1. Limited understanding among decision-makers – Climate action is often seen as an environmental issue rather than an economic necessity.
2. Near-term costs vs. long-term benefits – Many of the economic advantages of climate action will only be realised after 2050.
3. Unequal distribution of costs and benefits – Some nations and industries will bear higher transition costs, creating resistance to change.
4. Winners and losers in the energy transition – Industries reliant on fossil fuels face asset devaluation, while low-carbon sectors gain an advantage.
5. Gaps in economic modelling – Existing models do not fully capture cascading economic damages or the true cost of tipping points.

The need for climate investment

The report makes it clear, mitigation is the most cost-effective strategy for minimising economic losses from climate change. 

Every dollar invested in mitigation efforts today could generate a return of 5-14 times its value. 

At the same time, adaptation measures are essential for reducing climate-related damages, particularly over the next two decades. 

To meet the global target of limiting warming to 2°C by 2100, investment in mitigation must increase ninefold, while adaptation funding must rise thirteenfold by 2050.

However, the challenge is timing, 60% of climate investments must be made before 2050, while 95% of the economic damage from inaction will occur after this point. 

This underscores the need for immediate, large-scale funding to prevent irreversible damage.

"The economic case for climate action is clear, yet not broadly known and understood," says Annika Zawadzki, BCG Managing Director and Partner and co-author of the report. 

"Investment in both mitigation and adaptation could bring a return of around tenfold by 2100."

Strategies for a sustainable future

According to the report, to overcome these barriers, leaders must take decisive action in five areas:

• Reframe the debate to emphasise the economic risks of inaction and the financial benefits of early investment
• Create transparency on the net cost of inaction across all sectors
• Strengthen national policies to align with the Paris Agreement’s goals
• Enhance international cooperation to accelerate global climate action
• Improve economic modelling to capture the true scale of climate-related risks.

Climate change is not just an environmental issue, it is an economic one. 

The report makes it clear, the financial cost of inaction far exceeds the investment required to mitigate climate risks. 

Governments and businesses must act now to secure economic stability and protect future generations from devastating financial and social consequences.

By reframing climate action as an economic necessity, enhancing transparency and strengthening policies, decision-makers can ensure a sustainable and prosperous future. 

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