Sustainable Aviation Intelligence

28 Sep 2026

Japan's GX-ETS gets underway with limited aviation cost impacts

Japan’s Green Transformation Emissions Trading System (GX-ETS) entered its mandatory phase in 2026, three years after vo...

28 Aug 2026

SAVi Five: Air NZ blames war impacts for drop in SAF usage, REGENT raises $240m, US SAF use still rising…

Air New Zealand has blamed the Middle East conflict for a drop in SAF usage from 1.7% in FY2025 to 1.2% across FY2026 (A...

24 Jun 2026

EU ETS: Which airlines are most exposed to cost hikes and a scope expansion?

This report introduces interactive dashboards to add context to three pressing questions.

26 May 2026

EU/UK ETS: Free allowances end, so how much will costs rise for airlines?

This report reviews the evolution of the EU ETS and UK ETS costs for airlines since their inception and quantifies the p...

7 May 2026

What does the Iran War-driven energy shock mean for SAF?

Ishka SAVi looks back at the two months of volatility since the start of the Iran War to understand how SAF prices have ...

30 Apr 2026

ISTAT Sust Symposium: Iran war to pull sustainability into security agendas

Aviation sustainability stakeholders should be prepared to lean in on rising defense priorities, including in Europe, wh...

11 Mar 2026

Beyond winglets, what optional retrofits can cut fuel and emissions?

In this report, Ishka SAVi looks beyond first-generation winglets to identify retrofit options that can further curb fue...

16 Jan 2026

SAVi Five: EU ETS allowances reach €90, lessor SAF certificate guidance, and more…

EU ETS carbon prices rose above €90/t this week, the highest since mid-2023, with ICE EUA December 2026 futures trading ...

5 Jan 2026

Turning tax credits into cash: How US clean fuel producers monetise their 45Z incentive

Ishka SAVi examines how 45Z monetisation is working in practice in early corporate disclosures and speaks to Jenny Speck...

5 Dec 2025

AC25 round-up: US & China’s CORSIA stance, credit supplies, prices, and more…

This third and final AC25 report summarises the main takeaways around CORSIA adoption, including insurance products bein...

30 Oct 2025

IATA WSS: CORSIA costs expected to rise amid govts. lack of ‘awareness’

Key takeaways from IATA's WSS event, including perspectives on CORSIA’s implementation, shortcomings in SAF project fina...

15 Nov 2024

SAVi Five: COP29 gets underway, turning point for EU jet fuel tax proposal, and more…

UN Secretary-General António Guterres joined calls this week in favour of applying climate solidary levies to polluting ...

25 Oct 2024

SAVi Five: New Commission cautious on jet fuel taxes, first ETS funds for aviation, and more…

Incoming EU Commissioners have outlined limited appetite for unilateral European action on aviation policy, including je...

21 Oct 2024

Explainer: EU ETS Expansion

What does it mean, who could it impact, and what could convince the EU to dismiss it?

16 Oct 2024

Introducing CIRO, a new way to understand airline emissions risks and opportunities

Ishka Insights subscribers can now request a digital copy of the first CIRO Report examining Air France-KLM.

4 Oct 2024

SAVi Five: France and Colombia support aviation taxes, €292bn in e-SAF penalties, and more…

France and Colombia are the latest countries to introduce or increase aviation taxes, with the former targeting to raise...

12 Sep 2024

SAVi Briefing: Is the EU ETS set to expand in 2026? Unpacking the stakes for airlines

This Ishka SAVi Briefing unpacks the conditions and likely impacts of an EU ETS scope expansion, also known as the end o...

4 Sep 2024

Growing EU ETS bills – Which airlines will soon feel the pinch?

This report provides 2023 estimates for ETS bills of major European airlines in relation to their revenues.

5 Jul 2024

SAVi Five: Labour win may mean higher ETS costs for airlines, non-CO2 MRV draft act published, and more…

The UK Labour party earned an absolute majority in parliament on the 4th July general election, an outcome that carbon m...

28 Jun 2024

SAVi Five: Lufthansa adds surcharge for ETS/SAF/CORSIA costs, ESG money in aerospace accused of ‘greenwashing’...

Lufthansa Group has become the first major European airline group to announce environmental cost surcharges for departur...