Guardian: European leaders last night announced they were leading the world towards a low-carbon future after sealing an ambitious climate change pact by making generous concessions to the big polluters in European heavy industry. A two-day summit of 27 government leaders in Brussels ended a two-year effort to agree mandatory reductions in greenhouse gas emissions in Europe and came as a triumph for President Nicolas Sarkozy of France in the closing days of his six-month presidency of the …