Their "defence policy" precludes any armed intervention/peacekeeping etc. But what happens if country-X are forcing Beagles to smoke 40-a-day? What happens if country-Y cull some Badgers or country-Z chop down a tree.
Surely even the Greens would dispatch the Hooligans From Hereford in such grave and extreme circumstances? Err, armed with leaflets and banners and travelling on bicycles to leave a minimum carbon footprint, of course.