<span style="color: #222222;">Heads of state and government today kicked off "Climate Week, on the margins of the UN General Assembly,  urging world leaders to act urgently to reduce global warming.</span><br />'' <span style="color: #222222;">  </span><br />'' <span style="color: #222222;">With Poland hosting the Conference of the Parties (COP) 24 climate summit in December, UN climate chief Patricia Espinosa called on nations to unite behind limiting global warming to the less than two degrees Celsius enshrined in the 2015 Paris accord.</span><br />'' <span style="color: #222222;"><br />''Climate Week, held every year,  organized by The Climate Group in partnership with the United Nations and the city of New York, is in its 10th annual edition.</span><br />