TWO Greenpeace activists involved in the action that destroyed Genetically Modified wheat trials in Canberra last year have pleaded guilty to property damage charges. [...] The actions caused about $300,000 damage while stifling important research into the highly valued plant technology. The case was previously adjourned three times but on Monday in the ACT Magistrates Court, the two activists pleaded guilty to the charges of destroying Commonwealth property. The charge carries a maximum penalty of 10 years’ jail.