<span style="color: #222222;">The United Nations has warned that humanity has become a weapon of mass extinction.<br />''<br />''UN Secretary-General Antonio Guterres said the world has a chance to stop the orgy of destruction which has put a million species at risk of extinction. Speaking at the start of a high-level nature summit in Canada, he said it is time to forge a peace pact with nature.<br />''<br />''Governments are meeting in Montreal to agree on targets to reverse the loss of nature. Nearly 200 countries will try to agree on a way to put the world on a path to restoring nature by the end of the decade.</span><br />