Italy’s Senate on Wednesday gave final approval to legislation paving the way for a return to nuclear power nearly four decades after the Chernobyl disaster prompted the country to abandon atomic energy. The measure cleared the upper house 81-51 with seven abstentions. It marks a major step in Premier Giorgia Meloni’s drive to bolster energy security and meet climate goals, even though the construction of possible new reactors is still years away. The bill, which earlier passed the lower Chamber...