ALSA is dedicated to achieve economically, socially, and environmentally sustainable mobility, while also developing policies and initiatives responsible for the environment.


You must give a valid number of kilometres.

Find out how many CO emissions2 you can help prevent by travelling by bus.

Bus travel is the most energy-efficient and least-polluting method of transport. Find out for yourself:

Enter the number of kilometres of your journey:
kg CO2
kg CO2

A saving of

kg CO2

equivalent to:

  • 0 coffee makers
  • 0 hours of TV
  • 0 energy for a home

Calculations are based on:

  • Coach: 0.029 kg (0.06 lbs) CO2 / passenger and kilometre. This data is independently calculated by the Edinburgh Centre for Carbon Management and is based on an average coach load.
  • Car: 0.14 kg (0.3 lbs) CO2 / passenger and kilometre. This is derived from the DEFRA (Department for Environment, Food & Rural Affairs) CO2 emissions factor for an average petrol car which is 0.180 kg (0.39 lbs) CO2 / vehicle per km, and the average load of a car: 1.6 people / journey (DfT - Department for Transportation of the UK).

Data source:

More is less

If you want to know more about our environmental policies, feel free to download the brochure.

ALSA More is less (Más es menos) (PDF 5012 kb)