There have been a few of these on other threads, and I certainly don't know the answer- what do you do/ think-
soapnuts (flown half-way across the world) or washing liquid?
in Europe- local or organic ?
from out of Europe- fair-traid or organic ?
recycled paper or "from well managed forrests"? (growing trees take in more CO[sub]2[/sub] than old woodland, and if there is still demand for woodland will that stop developers building on it?)
a new-build "eco" house on green-field site or old house?
for current affairs/news -TV (electricity) or newspaper (manufacture/ transport/ printing)?
"eco" cleaners or tea tree (flown in from Australia)?
just to get you thinking…