A public service request for your input, from the Guardian:
The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts
What is the single most effective thing I could do to reduce my carbon footprint? Without dying, preferably. Andrew Hufnagel, Caithness
Post your answers (and new questions) below or send them to firstname.lastname@example.org. A selection will be published on Sunday.