Population Matters
Population Matters is an advocacy group or open-access publisher.
In detail
It is associated with United Kingdom. The record gives 1991 as its date of establishment or first appearance.
Its recorded founders are David Attenborough. Its recorded seat is United Kingdom and London.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Population Matters”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q4155736: Population Matters
Consult the source