You've lost me? The LEZ is relevant to bushcrafting?
Sorry, but unless you buy into the link between the flawed CO2 modelling used by a diminishing group of scientists who treat it like some sort of religious relic, the LEZ is nothing more than a traffic calming measure to control the flow of traffic in one of the busiest cities in the UK. The punitive penalties dished out to those unaware of the latest gimmick employed by authorities who pretend to have any interest in the environment are a joke and I disagree it will be applied elsewhere. Manchester, Birmingham and Bristol have already rejected it, along with the other fantasy suggestions.
Can you clarify, are you disputing an anthronic cause of climate change?
The LEZ is about air quality more than CO2. This covers stuff like PM and NO levels.
J