SCHEMA:
CREATE TABLE table_name_80 (_percentage_hydropower INTEGER, _percentage_nuclear_power VARCHAR, _percentage_oil VARCHAR, country VARCHAR)
USER:
what is the highest % hydropower when the % oil is less than 24.5, country is united arab emirates and the % nuclear power is 0?

QUERY:
SELECT MAX(_percentage_hydropower) FROM table_name_80 WHERE _percentage_oil < 24.5 AND country = "united arab emirates" AND _percentage_nuclear_power < 0