Swedish climate campaigner Greta Thunberg issued a warning to world leaders at a protest in the Swiss city of Lausanne on Friday, days before the start of the Davos summit of the world's political and business elites.

Far from feeling the heat, US President Donald Trump will be chilling in Davos, a fancy Swiss ski resort, when the Senate hears opening arguments in his impeachment trial next week.

Karnataka Chief Minister BS Yediyurappa on Monday said the much-awaited cabinet expansion will take place in about a week to 10 days and that he wants to complete the exercise before his proposed visit to Davos to attend the World Economic Forum meet later this month.