Pollution. Air pollution. Colorado Review of pollution study by Denver Research Institute. Post Empire Ap 1, 1979 p.10-15 Plan for a mandatory no-drive day for Denver area resi- dents resurrected by Environmental Protection Agency, Denver office. RMN Ap 12, 1979 p.8 Editorial by Carl R. Edmons, state representative from Grand Junction. Post Ap 29, 1979 p.21 Colorado senate votes to delay implementation of auto- emission program until Mr 1981. Post My 4, 1979 p.2