Climate Flash Report

Daily climate technology and sustainability news - Updated: 2025-10-31

Sustainability intelligence that saves the world

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Climate Tech & Sustainability Flash Summary – October 31, 2025

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Climate Tech Startups & Funding

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All Aboard Coalition Launches

Over a dozen VC and PE firms—including Khosla Ventures, Breakthrough Energy Ventures, and DCVC—have formed the All Aboard Coalition to support climate tech startups nearing commercialization. The coalition is closing a $300 million fund, supplementing members’ own $40+ billion in assets. First investments are expected this year.

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Funding Downturn

Global climate tech venture and growth investment dropped 19% in the first half of 2025 compared to 2024, totaling $13.2 billion (CTVC). US-based direct air capture startups saw a 60% decline in Q1 2025 venture funding ($58 million vs. $145 million in Q1 2024, Pitchbook).

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Top Investors

Breakthrough Energy Ventures (Bill Gates), Lowercarbon Capital, Ecosystem Integrity Fund, Clearvision Ventures, and Halogen Ventures remain active, focusing on decarbonization, carbon capture, energy storage, and sustainability.

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Startup Spotlights

25 climate tech startups were featured at Trellis Impact 25, collectively raising over $750 million. Y Combinator continues to back 49 climate startups in 2025.

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Clean Energy & Environmental Innovations

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Carbon Capture Goes Mainstream

Direct air capture and other carbon removal technologies are gaining commercial traction, despite funding challenges.

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AI & Data Center Synergy

Nuclear, geothermal, and energy storage startups are benefiting from the AI and data center boom, attracting new investment.

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Regional Hubs

The Bay Area and Boston lead US climate tech funding, while London and Stockholm are top European hubs. Massachusetts alone hosts 18 leading climate tech companies.

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ESG Investing & Impact

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Climate Tech Dominates Impact Investing

Climate tech accounts for 80–90% of impact investment, far outpacing social-focused startups.

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VC Share Growth

Despite a ~50% drop in climate tech VC funding since 2021, its share of total VC funding has risen from 14% to 16% over the past decade.

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Climate Policy & Headwinds

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Federal Rollbacks

The Trump administration has rescinded key climate spending, frozen grants, and rolled back many Inflation Reduction Act incentives, creating headwinds for renewables and electrification.

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Private Sector Steps In

With federal support shrinking, private investors and philanthropy are filling gaps. Startups like ClimateHaven are seeking corporate partnerships and private loans to sustain growth.

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Key Metrics & Impact

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US Cumulative Investment

$147 billion in climate tech since 2018 (2.4x more than China).

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Carbon Impact

Direct air capture startups are scaling, but funding declines threaten deployment speed.

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Policy Impact

Reduced federal incentives are slowing renewable energy adoption, but private capital and innovation are keeping momentum.

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Bottom Line

Climate tech faces headwinds from policy shifts and funding declines, but private investment, innovation, and strategic partnerships are driving continued progress in decarbonization and sustainability.