Mountain Fuel Supply Co. has asked the Public Service Commission to approve a pilot environmental transportation program to assist industrial customers in reducing air pollution emissions by using natural gas.

If approved, the program offers a new transportation rate for interruptible customers who demonstrate that natural gas usage will reduce air pollution emissions. The program will run from May 1 to Oct. 31.Mountain Fuel is proposing a 20 cents-per-decatherm rate for the environmental transportation program. The rate will cover all costs associated with the program plus contribute to the company's fixed-system costs.

Air quality has been a concern in Utah for many years, the company's application notes, and recently local government is paying close attention to air pollution problems. Several Mountain Fuel customers are seeking ways to reduce air pollution emissions, and natural gas offers a cleaner alternative to fuel currently being utilized, company officials said.