The series comprises mainly typed minutes of meetings of the executive committee, discussing issues such as afforestation, the designation of special areas of Wales as national parks, national park administration, road and bridge schemes, preservation of historic buildings, planning regulations, housing and industrial developments, coastal development, siting of radio and television stations, construction of power stations and electricity lines, reservoir and hydro-electric schemes, nuclear energy, pollution, protection of wildlife and natural habitats. Recurrent high profile issues include Trawsfynydd nuclear power station, 1954-1965, 1975, Llyn Brianne, 1966-1969, 1973-1976, the Rio Tinto Zinc Corporation, 1966-1971, pumped water storage schemes at Dinorwic (Dinorwig), 1971-1973, 1976-1981, and the Severn Barrage, 1981-1989. The minutes include circulars concerning CPRW constitution and policy, annual events, conferences and representation on other bodies such as the National Trust and Nature Conservancy Council.

Various flyers, mainly relating to peace and international solidarity which were circulated at the National Eisteddfod in 2026 including leaflets on subject including a campaign against nuclear reactors near Maesteg, the campaign against military radar stations in Pembrokeshire, military facilities in Aberporth, Gaza, Israeli nuclear weapons, the Cuba blockade and booklets in English and Welsh entitled "Beyond the War Economy; A Sustainable Proposal for Wales" along with the issue of the Morning Star with a Welsh language wraparound on Niclas y Glais. The fiel also includes flyers produced by TUC Cymru, All Under One Banner Cymru and Cymdeithas yr Iaith Gymraeg.