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flag South Africa’s SeaH4 won the 2025 ClimateLaunchpad Global Grand Final with an algae-based, carbon-neutral fuel for ships and planes.

flag South African clean tech startup SeaH4 won the 2025 ClimateLaunchpad Global Grand Final, beating over 2,700 entries from 40 countries. flag The company developed an algae-based, carbon-neutral fuel for marine and aviation transport, compatible with existing engines. flag The victory, which includes a €10,000 prize and global mentorship, highlights South Africa’s growing role in cleantech innovation. flag Runner-up Chaja from Tanzania and third-place finisher OneFly from Colombia also received support. flag The competition, returning to an in-person format in Vienna, is backed by Climate KIC, Bank of America, and Irish Aid. flag Since 2014, it has helped startups secure over €500 million in investment.

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