Climate Flash Report

Daily climate technology and sustainability news - Updated: 2025-09-30

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The latest developments in climate technology and sustainability on September 30, 2025, highlight significant funding initiatives, startup innovation, and policy challenges:

•

Climate Tech Startups and Funding

A major new fund called the *All Aboard Coalition*, backed by a $60 billion venture capital alliance, has launched a $300 million fund to support climate-tech startups transitioning from pilot phases to commercial scale. This fund targets the critical "valley of death" funding gap, providing rounds of $100–200 million to help companies build manufacturing facilities and commercial systems. The coalition includes prominent investors such as Breakthrough Energy Ventures, Khosla Ventures, and DCVC, managing over $40 billion in assets collectively. The fund aims to signal to larger institutional investors the viability of these startups, addressing the decline in federal support and private funding under the current U.S. administration[1][2][4].

•

Clean Energy and Carbon Impact

U.S.-based startups working on direct-air capture technologies have seen a 60% decline in venture funding in early 2025, receiving about $58 million compared to previous years. Despite this, overall U.S. climate tech funding in the first half of 2025 rose by 21% year-over-year, reflecting ongoing investor interest in sectors like energy, carbon capture, transport, industry, and nature-based solutions[2][3].

•

ESG Investing

Venture capital firms are increasingly focusing on climate tech as part of ESG (Environmental, Social, and Governance) strategies, with firms like Breakthrough Energy Ventures (backed by Bill Gates) investing in early-stage decarbonization technologies including energy storage and sustainable agriculture. These investments are critical for scaling innovations that reduce carbon emissions and promote sustainability[5].

•

Climate Policy

The current U.S. federal climate policy environment is challenging, with reduced spending and rescinded grants under the Trump administration, which has led private investors to fill the funding void for climate solutions. This policy backdrop underscores the importance of private capital coalitions like All Aboard to sustain momentum in climate innovation[2].

•

Environmental Innovations

The Trellis Impact 25 initiative continues to spotlight 25 promising early-stage climate tech startups across five categories—energy, carbon, transport, industry, and nature—helping them gain visibility among investors and policymakers. This program supports startups with unique solutions and strong impact potential, fostering innovation despite political and economic uncertainties[3].

In summary, the climate tech ecosystem in late 2025 is marked by a strategic push from private investors to bridge funding gaps for scaling clean technologies, a mixed funding landscape with some declines in specific areas like direct-air capture, and ongoing efforts to promote innovative startups through targeted programs and ESG-aligned investments. The $300 million All Aboard Coalition fund is a key development aimed at overcoming the "valley of death" in climate tech commercialization, crucial for achieving significant carbon impact and advancing clean energy solutions[1][2][3][4][5].