Greta Thunberg hits out at world leaders over climate actions, says '30 years of blah blah blah'

Greta Thunberg and fellow youth campaigners struck a skeptical tone for this week`s climate talks in Italy, saying much has been promised but little done to tackle global warming in almost three decades since the landmark Earth Summit. Thirty years of blah, blah, blah," Thunberg told the opening session of a Youth4Climate event on Tuesday.