New Delhi, Dec. 11 -- Despite urgent calls by the UN secretary general asking countries to raise their ambitions and enhance nationally determined contributions (NDCs) at the United Nations Climate Summit in September, a new analysis released at COP25 in Madrid on Tuesday shows that under current policies global temperatures will see a rise of 3 degrees Celsius over pre-industrial levels by the end of the century and a rise of 2.8 C if all pledges under the Paris Agreement are implemented....