Many companies and projects, like the documentary Jeff mentioned
a couple of weeks ago, claim to be "carbon neutral" – which
is a worthy thing to be. But obviously it’s a lot easier to say that
you’re carbon-neutral than it is to actually be carbon-neutral. Is
there any generally-accepted entity which audits these things and confirms their
carbon-neutral status? If not, do any of them make their carbon budgets public?
I do understand that both the credit and the debit side of any carbon budget
will be open to endless quibbling. But that doesn’t mean we should just take
companies on trust when they make such claims.