This issue is predominantly a reminder about the Radical Ecology Conference (R.E.C.) to be held in the Union Building at Melbourne University over Easter 1975. The conference presents a first step towards building a strengthened, effective, confident radical ecology movement. As readership of Ecoso Exchange has historically been basically entrenched in urban environment, enclosed are some tentative notes for the R.E.C Commission on Urban Environment. These notes also give some idea of the scope of the R.E.C Commissions. In this issue: 1. Some information on the Radical Ecology Conference 2. How one can help the Radical Ecology Conference 3. Some notes for the Commission on Urban Environment at R.E.C