Climate Flash Report

Daily climate technology and sustainability news - Updated: 2025-09-23

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The latest developments in climate technology and sustainability on September 23, 2025, highlight significant funding initiatives, startup innovations, and policy-related events:

•A $300 million fund backed by a $60 billion venture capital alliance called the “All Aboard Coalition” was launched to support climate-tech startups transitioning from pilot to commercial stages. This fund targets rounds of $100–200 million to help companies build manufacturing facilities, test prototypes, and scale operations. The initiative aims to close the “valley of death” funding gap and could enable climate solutions that reduce emissions by gigatons by 2030[1].

•Early-stage climate tech startups continue to gain traction, with U.S. funding in the first half of 2025 up 21% year-over-year. The Trellis Impact 25 program is spotlighting 25 promising startups across five sectors: energy, carbon, transport, industry, and nature. These startups are recognized for their unique solutions and impact potential, with finalists pitching to investors and policymakers at an event in late October 2025[2].

•Notable climate tech startups include Brineworks, which recently raised $5.87 million in seed funding to scale its patented technology that extracts CO2 from seawater via electrolysis, producing hydrogen and CO2 feedstocks for sustainable aviation fuels and e-methanol for shipping. Brineworks targets commercial readiness by the end of 2026, aiming to lower costs for direct air capture and e-fuels[4].

•Venture capital firms remain active in climate tech, with major investors like Breakthrough Energy Ventures and Lowercarbon Capital focusing on decarbonization technologies including energy storage, carbon capture, and clean energy[3].

•Accelerator programs such as Venture For ClimateTech continue to support early-stage innovators with up to $50,000 in non-dilutive funding, mentorship, and investor connections. Their 2025 cohort is progressing through phases of market validation, investor bootcamps, and pilot building, helping startups prepare for scale[5].

•While specific new climate policies were not detailed in the latest news, the presence of government officials at startup pitch events and the emphasis on ESG investing indicate ongoing policy engagement and regulatory interest in supporting climate tech innovation[2].

Key metrics and impacts

•The $300 million fund aims to enable climate solutions that could cut emissions by *gigatons* by 2030[1].

•Brineworks’ technology targets scalable direct air capture and production of sustainable fuels, potentially impacting emissions in aviation and shipping sectors significantly[4].

•U.S. climate tech funding increased by 21% in H1 2025 compared to 2024, reflecting growing investor confidence[2].

This landscape shows a robust ecosystem of funding, innovation, and policy interaction driving forward climate technology and sustainability efforts in late 2025.