The ocean is our greatest climate ally
https://arab.news/g2hep
As world leaders and corporate boards scramble to engineer the next complex technological fix for climate change, they continue to overlook Earth’s most powerful, time-tested climate ally: the ocean.
Covering 71 percent of our planet, this vast blue engine quietly absorbs around 90 percent of the excess heat generated by greenhouse gases and captures nearly a quarter of human-made carbon dioxide. The ocean isn’t just a geographic feature that makes our planet unique; it is the ultimate stabilizer of human civilization.
Yet, we are pushing this vital life-support system to its breaking point. Marine heatwaves, runaway coral bleaching, and escalating ocean acidification are no longer distant scientific forecasts. They are unfolding ecological crises that disrupt fragile marine habitats, collapse regional fisheries, and directly threaten the livelihoods of coastal communities globally.
But the ocean is not merely a victim of climate change; it is our most potent weapon against it. The solution lies right at the water’s edge in “blue carbon”— the massive volumes of carbon captured and locked away for centuries by coastal ecosystems like mangroves, seagrass meadows, and salt marshes.
Acre for acre, these marine habitats bury carbon far more efficiently than tropical rainforests. Beyond their carbon-catching prowess, they act as natural storm barriers, filter our waters, nurse global fisheries, and anchor entire coastal economies.
Tragically, we are destroying these assets through aggressive coastal development, pollution, and short-sighted land use. When we dredge a seagrass meadow or clear a mangrove forest, we don’t just lose a habitat; we puncture a carbon bank, releasing centuries of stored emissions back into our atmosphere. Protecting and restoring blue carbon is not an environmental luxury; it is one of the most cost-effective climate and biodiversity imperatives of our time.
This requires a radical mental shift. We must stop viewing the ocean as an infinite resource to be exploited, and start treating it as a premium natural asset which value grows through long-term investment. This philosophy is precisely what drives the next-generation “blue economy” — a model where sustainable aquaculture, marine renewables, and regenerative tourism thrive alongside ecosystem restoration. It turns conservation from a charitable expense into a viable, wealth-generating economic sector and an untapped pool of meaningful jobs.
Saudi Arabia is uniquely positioned to spearhead this global transformation. Under the Saudi Green Initiative, the Kingdom’s commitment to plant 100 million mangrove trees and protect 30 percent of its marine and coastal areas by 2030 is a massive step forward.
This is not just about meeting targets; it is about rewriting the playbook for arid-region sustainability. For, the statement by Pliny the Elder that “in the Red Sea trees are of a remarkable nature”, upon Roman legions first encountering mangroves, continues to hold today.
At KAUST, our scientific research and pioneering mapping of Red Sea ecosystems serve a clear purpose: providing the rigorous, credible data needed to turn these ambitious conservation targets into high-impact, value-creating projects. Our tenet that ecological restoration and economic diversification are not mutually exclusive, is embodied in the regenerative tourism model championed by the Red Sea project, which creates tangible, long-term benefits for local communities and the Kingdom at large.
The climate crisis is too complex for any single policy or industrial technology to solve alone.
While renewable energy, carbon management, and global diplomatic cooperation remain indispensable, the ocean must become a central pillar of advanced climate strategies, such as the circular carbon economy. Investing in blue carbon is not just an environmental gesture — it is a calculated investment in human resilience, economic survival, and the legacy we leave for future generations.
- Prof. Carlos Duarte is the Ibn Sina Distinguished Professor of Marine Science at King Abdullah University of Science and Technology.
