Climate Flash Report

Daily climate technology and sustainability news - Updated: 2025-09-21

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On September 21, 2025, key developments in climate technology and sustainability include a major $300 million fund launched by the All Aboard Coalition, a group of venture capital and private equity firms managing $60 billion in assets, aimed at bridging the critical funding gap for climate-tech startups transitioning from pilot to commercial stages[1][2]. This fund targets investments of $100–200 million to help companies scale manufacturing and commercial deployment, addressing the so-called “valley of death” in climate innovation funding[1].

In the startup ecosystem, Brineworks, an Amsterdam-based climate-tech company, recently raised $5.87 million in seed funding to scale its patented technology that extracts CO2 from seawater via electrolysis, producing hydrogen and CO2 as feedstocks for sustainable aviation fuels and e-methanol for shipping. The company aims for a commercial-ready product by the end of 2026, contributing to low-cost direct air capture and sustainable fuel production[5].

U.S. climate tech funding showed a 21% increase in the first half of 2025 compared to the previous year, despite political and economic uncertainties. The Trellis Impact 25 initiative highlights 25 promising early-stage startups across energy, carbon, transport, industry, and nature sectors, fostering innovation toward net-zero emissions[3].

On the investment front, prominent venture capital firms such as Breakthrough Energy Ventures and Lowercarbon Capital continue to focus on early-stage climate tech companies in decarbonization, energy storage, carbon capture, and clean energy technologies, providing both financial and strategic support[4].

Regarding policy, the U.S. federal climate spending has been reduced under the current administration, leading private investors to fill the funding void for emissions-cutting technologies. This shift has caused a decline in venture capital for direct-air capture startups by over 60% year-over-year in early 2025, underscoring the importance of private coalitions like All Aboard to sustain climate innovation[2].

In summary:

•

Funding

$300M All Aboard Coalition fund launched to support climate-tech scale-up; Brineworks raised $5.87M seed round for CO2-from-seawater tech[1][5].

•

Carbon Impact

Brineworks’ technology targets direct air capture and sustainable fuel feedstocks, potentially reducing aviation and shipping emissions[5].

•

Startups

21% increase in U.S. climate tech funding H1 2025; Trellis Impact 25 highlights top early-stage innovators[3].

•

Investors

Leading VCs like Breakthrough Energy Ventures and Lowercarbon Capital actively invest in decarbonization and carbon capture startups[4].

•

Policy

U.S. federal climate funding cuts shift burden to private investors; venture capital for direct-air capture declined 60% in early 2025[2].

These developments reflect a dynamic climate tech landscape where private capital and innovative startups are crucial to advancing clean energy and sustainability amid shifting policy environments.