* Thousands of climate activists march through Glasgow * Youth at the U.N. talks present their blueprint for action * COP26 leaders back their ideas as part of summit outcome By Megan Rowling and Laurie Goering GLASGOW, Nov 5 (Thomson Reuters Foundation) - Young people took centre-stage at the COP26 U.N. climate talks on Friday, presenting their demands for a greener, fairer world to the U.N. climate chief and senior UK politicians who promised to recommend their proposals to governments at the summit.