The United Nations climate conference in Madrid, COP25, on Thursday saw Santa Claus with a social message. Philip McMaster, who calls himself 'SustainaClaus' is an advocate of sustainable life. At the conference, he urged parents to become more conscious in the holiday season and echoed teen climate activist Greta Thunberg's message. He emphasised that world governments and individuals aren't doing enough to tackle the climate crisis. SustainaClaus suggested parents make their own gifts by hand and get rid of packaging to conserve the environment.