An American report has warned of possible additional ozone pollution from the use of some alternative fuels.
The warning comes as Thailand gears up to increase the use of alternatives such as bio-diesel and gasohol in the face of rising oil prices,and has spawned a debate on the relative merite of the fuels.
A Thai expert said alternative fuels could reduce levels of fine dust which plague big cities and lodge in people’s lung,which was of more concern.
The study by Prof. Larry Anderson, of the University of Colorado, found bio-diesel and gasohol would increase NO , an oxide of nitrogen and a precursor to low-level ozone.