Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_73729 ( "Country" text, "Annual CO2 emissions (in thousands of metric tons)" real, "GDP (current, in billions of US dollars)" text, "GDP per Emissions (in US dollars per ton)" real, "GDP (PPP, in billions of current international dollars)" text, "PPP GDP per Emissions (in international dollars per ton)" real )

### Question ###
When the gdp (ppp, in billions of current international dollars) is 7.93, what is the maximum ppp gdp per emissions (in international dollars per ton)?

### Accurate SQL ###

SELECT MAX("PPP GDP per Emissions (in international dollars per ton)") FROM table_73729 WHERE "GDP (PPP, in billions of current international dollars)" = '7.93'