Rebuilding Gaza after the Israeli offensive could take 40 years and cost over $80 billion, say aid agencies. The war has left the enclave in ruins, with damaged infrastructure and destroyed homes. The full extent of the damage will be known once the fighting ends, but it is estimated that 70% of structures in Gaza have been damaged or destroyed. The first target for aid is the health sector, with over 80% of Gaza's health facilities damaged or destroyed.