Whether the row covers a group of countries (NETWORK) or a single country (STATE).

The area covered, such as ECAC or EU27 for networks, or a country code for states.

How flights are assigned to the area. AREA FOCUS counts the part of each flight inside the area.

The calendar year the figures cover.

The month the figures cover, as a number from 1 to 12.

The type of operator, such as mainline, low-cost, regional, business or cargo.

How the flight relates to the area. A is arriving, D is departing, I is internal and O is an overflight.

The phase of flight the emissions come from, such as taxi-out, climb, cruise, descent or taxi-in.

The number of flights in this group. It repeats on every phase row, so don't add it up across phases.

The estimated CO2 emitted, in tonnes.

The estimated nitrogen oxides emitted, in kilograms.

The estimated sulphur oxides emitted, in kilograms.