Climate Flash Report

Daily climate technology and sustainability news - Updated: 2025-09-27

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The latest developments in climate technology and sustainability as of September 27, 2025, highlight significant activity in climate tech startups, clean energy innovations, ESG investing, and climate policy shifts:

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Climate Tech Startups and Funding

A coalition of leading venture capital firms, including Khosla Ventures, Breakthrough Energy Ventures, and DCVC, has launched the All Aboard Coalition to address funding challenges for climate tech startups nearing commercialization. This initiative aims to close an initial fund of about $300 million by October 2025 to support emissions-cutting technologies, especially as federal funding declines under the current U.S. administration[1]. Despite a 60% drop in venture funding for direct-air capture startups in early 2025, overall U.S. climate tech funding rose by 21% in the first half of 2025 compared to the previous year[2]. Notable startups like Amsterdam-based Brineworks recently raised $5.87 million in seed funding to scale their patented technology that extracts CO2 from seawater to produce sustainable aviation fuels and e-methanol for shipping, targeting commercial readiness by end of 2026[4].

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Clean Energy and Carbon Impact Innovations

Brineworks’ technology uses electrolysis powered by intermittent solar and wind energy to produce hydrogen and capture CO2, aiming to lower costs for direct air capture and enable scalable low-carbon fuels for transport sectors[4]. This reflects a broader trend where startups focus on scalable, low-cost carbon removal and clean fuel production.

•

ESG Investing and Venture Capital Trends

Venture capital firms are increasingly selective, focusing on startups with strong IP, infrastructure, and regulatory alignment. Firms like Breakthrough Energy Ventures and Lowercarbon Capital continue to invest across energy storage, carbon capture, and clean energy sectors, supporting early to growth-stage companies[3][5]. The All Aboard Coalition’s $300 million fund complements these efforts, managing over $40 billion in assets collectively[1].

•

Climate Policy Context

The U.S. federal government under President Trump has reduced climate spending and rescinded grants, creating a funding gap that private investors are attempting to fill[1]. Meanwhile, regulatory frameworks such as the U.S. Inflation Reduction Act (IRA) and the EU Green Deal continue to influence investment flows and startup strategies globally[5].

•

Environmental Innovations and Metrics

Startups on the Trellis 25 Climate Tech Startups to Watch list focus on five sectors—energy, carbon, transport, industry, and nature—with innovations aimed at net-zero targets. These startups are evaluated on solution uniqueness, traction, team strength, and impact potential, reflecting a growing emphasis on measurable carbon impact and sustainability outcomes[2].

In summary, despite political and economic headwinds, climate tech startups are securing substantial venture funding, with new coalitions and investors stepping in to support commercialization of carbon removal and clean energy technologies. Innovations like Brineworks’ seawater CO2 extraction demonstrate promising carbon impact metrics, while ESG investing and climate policies continue to shape the landscape for sustainable technology development in 2025.

Climate Flash Report

🌱 Clean Energy Stock Tracker

Climate Tech Startups and Funding

Clean Energy and Carbon Impact Innovations

ESG Investing and Venture Capital Trends

Climate Policy Context

Environmental Innovations and Metrics

Climate Tech

Clean Energy

Climate Policy

Carbon Markets

Renewable Energy

Climate Data

Sustainability

Environmental Impact

General

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