Why COP30 must deliver measurable progress on adaptation
By Luckson Zvobgo, Head of Science Policy at the Climate Risk Lab, University of Cape Town and technical expert on the Global Goal on Adaptation
Every year, the cost of climate inaction grows heavier and the world’s poorest pay the highest price. In Africa, the bills are already arriving: washed-away roads, ruined harvests, displaced families. But these are not just humanitarian losses, they are economic ones. The African Development Bank estimates that the continent loses up to 15% of GDP growth annually to climate impacts. And these costs are accelerating faster than the world’s ability to respond.
That is why this year’s UN Climate Summit, or COP30, must deliver a strong Global Goal on Adaptation (GGA) outcome with clear, measurable indicators of progress that help protect the most vulnerable, global economy and ecosystems. Without them, adaptation remains a vague promise, impossible to track, fund, or scale.
Inaction is the most expensive option
It is often said that adaptation is costly. But the truth, backed by data, is that inaction is costing far more. The World Bank estimates that every dollar invested in resilient infrastructure can yield up to four dollars in avoided losses. Despite this, adaptation finance remains a fraction of global climate spending and that small share is often directed without clarity on what success looks like.
Without indicators, countries cannot demonstrate results. Donors cannot track impact. And local communities, from farmers to coastal residents, are left to improvise their own protection against rising risks. The result is inefficiency, duplication, and mounting losses.
A failure to measure resilience
Mitigation has succeeded in attracting global attention and funding precisely because it has metrics: tonnes of CO₂ reduced, gigawatts of clean energy installed. Adaptation, by contrast, lacks such precision. We do not have a shared way to measure whether climate-resilient agriculture is reducing vulnerability, or whether early warning systems are saving lives.
This absence of data makes it easier for the international community to underinvest in adaptation because they cannot be held accountable for what they cannot measure. Strong indicators under the Global Goal on Adaptation would change that. They would make adaptation progress visible, comparable, fundable, and more importantly, a global responsibility.
The Global North also stands to lose
The GGA should not be seen as an act of charity by developed countries. It is a matter of global economic stability. Climate-driven food shocks in Africa and Asia ripple across global supply chains. Floods and droughts trigger migration, strain humanitarian budgets, and raise insurance costs worldwide. The longer the world delays building resilience in the most vulnerable regions, the higher the shared bill becomes
Strong indicators are not bureaucratic detail, they are the foundation of efficiency. They will help ensure that every dollar spent on adaptation delivers measurable results, reducing the human and financial costs of future crises.
COP30: The moment to make adaptation real
In Belém, negotiators have the chance to make the GGA meaningful, to set not just aspirations, but a way to measure progress against them. This is how the world can finally honour the Paris Agreement’s commitment to give adaptation equal weight to mitigation. It is therefore critical that Parties adopt a robust GGA that consists of clear, objective indicators that can track adaptation finance, technology development and transfer, and capacity building to ensure the most vulnerable receive the resources they need to adapt.
The science is unequivocal: the longer we wait, the more expensive adaptation becomes, and the more lives we put at risk.
The cost of building resilience today is a fraction of what we will pay for a climate disaster tomorrow. COP30 is not just another negotiation; it is a test of whether the world has learned this simple truth.
