"Rydyn ni'n gwybod bod y rhan fwyaf o allyriadau amonia'n dod o'r sector amaeth ac felly mae'r her rydyn ni'n ei rhoi i fusnesau yn canolbwyntio'n bennaf ar hyn.
“We know most ammonia emissions come from the agriculture sector and so the challenge we are putting to businesses is primarily focussed on this.