GreenSkies is a worldwide information network of environmental organisations concerned with aviation's environmental effects. The network started as a European initiative, and its members are predominantly based in Europe. However, organisations from all over the world are increasingly joining.

The key objectives of the GreenSkies Network are to;

a) reduce noise at airports, especially at nights; and
b) reduce the industry's growing contribution to global climate change.

To promote these objectives the GreenSkies Network works together to exchange information and raise awareness of the issues.

In addition, the GreenSkies Network aims to ensure that the views of the 100 plus partner organisations involved are effectively communicated to decision-making bodies such as the International Civil Aviation Organisation (ICAO), and the European Union (EU). 

http://www.greenskies.org/