Climate activists in Poland temporarily blocked access to the stadium in Warsaw during pop star Taylor Swift’s three-day series of concerts at the Kazimierz Górski National Stadium in the Polish capital. The protesters, with the Polish branch of the Last Generation climate activist group, halted a convoy of vehicles trying to drive into the stadium before Swift’s second concert on Friday. “The ultra-rich are killing us,” one banner held by an activist read. An activist said in a video posted to X: “Taylor Swift, other celebrities and politicians are over-exploiting the power and resources of t…