Tuhia he haere tonu mo tenei whitianga - Ko Yorke tetahi o nga tangata rongonui i tautoko i te kaitono a te Paremata o te roopu Green Caroline Lucas i te pooti nui a UK 2015. I te Hakihea 2015, i mahi ia i te Huihuinga Huringa Huarere o te United Nations
i Paris i tētahi konohete atawhai hei āwhina i te 350.org, he whakahaere taiao e whakanui ana i te mōhio mō te huringa o te āhuarangi. Ko tana mahinga me etahi atu mai i te huihuinga i tukuna i runga i te pukaemi ora "Pathway to Paris" i te Hurae 2016. I whakawhiwhia e Yorke he ara hiko, "Hands Off the Antarctic", hei whakamahi i roto i te kaupapa Greenpeace 2018.