The document discusses the European Union's Emission Trading Scheme and its implications for Indian airlines. The EU ETS aims to reduce greenhouse gas emissions through capping emissions and allowing trading of allowances. It includes aviation emissions starting in 2012. Indian airlines that fly routes to and from Europe must monitor and report their emissions. They will receive some allowances for free in 2012 based on past traffic, and may need to buy more allowances if emissions exceed the cap, or sell allowances if emissions are lower than allocated. Compliance with the EU ETS presents new responsibilities for covered Indian carriers.