<p>Swedish campaigner Greta Thunberg on Friday branded the UN climate summit in Glasgow a "failure" after a week of negotiations produced what some experts have called vague promises to cut emissions.</p>.<p>"It is not a secret that COP26 is a failure," Thunberg told thousands of youth protesters at a march in the Scottish city.</p>.<p>She called the COP26 talks "a two-week long celebration of business as usual and 'blah, blah, blah'."</p>.<p><strong>Check out the latest videos from <i data-stringify-type="italic">DH</i>:</strong></p>
<p>Swedish campaigner Greta Thunberg on Friday branded the UN climate summit in Glasgow a "failure" after a week of negotiations produced what some experts have called vague promises to cut emissions.</p>.<p>"It is not a secret that COP26 is a failure," Thunberg told thousands of youth protesters at a march in the Scottish city.</p>.<p>She called the COP26 talks "a two-week long celebration of business as usual and 'blah, blah, blah'."</p>.<p><strong>Check out the latest videos from <i data-stringify-type="italic">DH</i>:</strong></p>