Harare International Airport. THE Civil Aviation Authority of Zimbabwe (CAAZ) is exploring alternative ways to mobilise resources for the Aviation Infrastructure Development Fund (Aidef) but is still seeking to raise cash for loan repayments for a local airport expansion through an increase in airport tax, an executive has said. CAAZ has proposed a 100 percent increase in airport tax, which goes into Aidef, to raise money to repay a loan for the upgrading of the Harare International Airport. The upgrade is expected to gobble up $153 million and will be funded through a loan from China. The authority indicated early this year that it would seek government approval to increase the airport tax by 100 percent…