About us (old)

Tim Johnson

General Inquiries & Market-based Measures


Aviation Environment Federation (UK)

Bill Hemmings


Aviation and Shipping Manager

Transport & Environment (BE)

Dan Rutherford

Emissions, Technology, & Alternative Fuels

Senior Researcher

The International Council on Clean Transportation (US)

ICSA was established in 1998 by a group of national and international environmental NGOs as official observers at the UN’s International Civil Aviation Organisation, ICAO. While many states have introduced policies and regulations to address aircraft’s greenhouse gas emissions and noise over the years, the need for a common approach for international aviation has led most countries to support and adopt the work of the UN’s International Civil Aviation Organisation. ICAO has a long history of setting standards to limit aircraft noise and engine emissions, but its work on climate change was brought into sharp focus in 1997 when Article 2.2 of the Kyoto Protocol requested developed countries to pursue the limitation and reduction of greenhouse gas emissions from aircraft through ICAO.


Since its inception, ICSA has contributed to ICAO’s Committee on Aviation Environmental Protection (CAEP) work on technical means to reduce emissions and noise, the role of market-based measures, supporting economic and environmental analysis, modeling and forecasting, and ICAO’s carbon calculator. It has also been invited to present its views at ICAO workshops on carbon markets and biofuels, and has presented to the high-level Group on International Aviation and Climate Change (GIACC).


ICSA uses the expertise within its NGO membership to formulate its coordinated positions. To gain the broadest level of understanding and input from environmental NGOs, ICSA communicates with, and invites comment from, other NGO networks and bodies working in related areas. ICSA’s participation in ICAO and CAEP meetings is currently provided by the Aviation Environment Federation (AEF), the International Council for Clean Transportation (ICCT) and Transport & Environment (T&E).