Climate Flash Report

Daily climate technology and sustainability news - Updated: 2025-12-09

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Climate Tech & Sustainability Flash Summary

Major Funding Announcements

Spark Cleantech Secures €30M for Industrial Decarbonization

Paris-based Spark Cleantech has closed a €30 million Series A round to scale its methane plasmolysis technology for heavy industry decarbonization.[1] The deeptech startup, spun out of CentraleSupélec, uses pulsed plasma to convert natural gas into clean hydrogen and solid carbon before combustion. This approach enables steelmakers and manufacturers to reduce CO₂ emissions without replacing existing equipment while producing valuable carbon nanomaterials as a byproduct. The funding round, led by 360 Capital and Taranis (€17M in equity plus non-dilutive support), will support construction of the first full-scale production module and industrial deployment.[1]

Airwallex Raises $330M in Series G

Fintech platform Airwallex has raised $330 million in Series G funding, bringing its total capital raised to approximately $1.5 billion.[1] While primarily a payments infrastructure company, the round reflects continued investor confidence in climate-adjacent financial technology supporting the transition economy.

Energy Storage & Advanced Nuclear Momentum

Recent funding activity shows strong investor appetite for critical climate infrastructure:[4]

•ZincFive raised $30 million for nickel-zinc battery energy storage systems, bringing total funding to $162.7 million

•Antares Industries secured $71 million for advanced nuclear reactor design and manufacturing, with $101 million in total equity funding

•Cambium closed a $94.4 million round for biomaterials used in renewable energy applications

Market Trends & Investment Patterns

Industrial Decarbonization Surges

Industrial decarbonization and manufacturing companies captured 19.3% of U.S. climate tech funding in the first half of 2025, up significantly from 9.6% in 2020.[2] Near-term demand remains strong for cost-saving deployments including efficiency software, process electrification, waste-heat recovery, and low-carbon materials projects.

Funding Landscape Shifts

U.S. climate tech investment totaled $15.3 billion in the first half of 2025, compared to $11.4 billion in the same period of 2024.[2] However, the funding distribution has shifted notably:

•Seed deals declined 12.8% year-over-year

•Series A deals fell 12%

•Series B deals increased 26.8%

•Series C and later-stage rounds jumped 33.3%, capturing the bulk of activity

Energy generation systems and infrastructure remain the largest funding category at 33.2% of total investment, driven partly by AI-driven power demand and grid modernization projects.[2]

Notable Climate Tech Innovations

Form Energy's Multi-Day Storage

Form Energy's iron-air battery technology enables 100-hour energy storage, addressing renewable intermittency challenges for grid reliability.[3] The company raised €150 million in a Pre-IPO round (extended through July 2025) and carries a $1.2 billion valuation.

Rondo Energy's Industrial Heat Solutions

Rondo Energy develops high-temperature thermal energy storage systems storing excess renewable electricity as heat in solid materials for industrial processes up to 1,500°C, directly addressing industrial heat decarbonization which accounts for approximately 15% of global CO₂ emissions.[3]

ZeroAvia's Zero-Emission Aviation

Zero