Course
Sustainability: how Heathrow counts its footprint
A sustainability course taught through one real place: how Heathrow airport counts what it costs the world, where the big number really is, what a baseline and a target are, how noise and dirty air are measured next door, and what net zero adds up to.
The shape of it
15 lessons
About 68 minutes in total. Your progress is kept on this device — no account, nothing sent anywhere.
Course complete
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The lessons
What sustainability means
4 lessons · about 18 min01A cost nobody is billed for
Spot the costs of an airport that have no price and no payer, and say who they land on.
About 5 min
02A footprint is a count
Work out carbon from fuel burned, and read Heathrow's footprint by year and per passenger.
About 5 min
03Whose smoke is it
Tell apart the three scopes, and work out why an airport's count is almost all planes it does not own.
About 5 min
04A baseline is a year you chose
Work out a target from a baseline, and see how the chosen year changes the story the same number tells.
About 5 min
The flights: 96 in 100
4 lessons · about 18 min05Three ways to burn less
Trace the three levers that cut carbon in the air, and tell the slow one from the small one.
About 5 min
06A new fuel in the same tank
Tell apart what SAF does at the exhaust from what it does over its whole life, and work out the share needed for a cut.
About 5 min
07Why the cheap fuel wins
Work out why the dearer fuel loses with no rule, and what a mandate, a penalty and a fund each do.
About 5 min
08Growth eats the saving
Multiply flights by carbon per flight, and work out what a third runway does to the total.
About 5 min
The costs next door
4 lessons · about 18 min09Noise is counted in people
Tell a count of people inside a noise line from a count of complaints, and read Heathrow's by year.
About 5 min
10Whose afternoon is quiet
Trace how runway alternation shares noise by the clock, and spot where the sharing stops.
About 5 min
11Air you can measure
Tell a reading from a count, compare it with the legal line, and work out how aircraft's share fades with distance.
About 5 min
12How you got here counts too
Spot why the trip to the airport is in the airport's count, and read the public transport share as the lever.
About 4 min
Counting honestly
3 lessons · about 14 min13The ground is the part it can run
Read the ground count by source, and work out what a green certificate changes and what it does not.
About 5 min
14Net means take away
Work out net from gross and offsets, and sort what sits inside Heathrow's total from what is printed beside it.
About 5 min
15A third runway, taken apart
Take one real proposal apart with every tool in the course, and hear a count from a promise.
About 5 min