UPDATE 5-Italy's Eni vows to become carbon neutral by 2050 in latest green push
* Eni to merge renewable and retail businesses* Eni targets capex of 7 bln euros/yr to 2024* Shares rise 1.2% vs 0.5% European oil & gas index (Adds detail from conference call)By Stephen Jewkes and Agnieszka FlakMILAN, Feb 19 (Reuters) - Italy's En...
