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)?
SQL: SELECT MAX("PPP GDP per Emissions (in international dollars per ton)") FROM "1-2508175-1" WHERE "GDP (PPP, in billions of current international dollars)" = '7.93';

Question: when the gdp per emissions (in us dollars per ton) is 3903, what is the maximum annual co2 emissions (in thousands of metric tons)?
SQL: SELECT MAX("Annual CO2 emissions (in thousands of metric tons)") FROM "1-2508175-1" WHERE "GDP per Emissions (in US dollars per ton)" = 3903.0;

Question: when the annual co2 emissions (in thousands of metric tons) is 1811, what is the country?
SQL: SELECT "Country" FROM "1-2508175-1" WHERE "Annual CO2 emissions (in thousands of metric tons)" = 1811.0;

Question: when the gdp (current, in billions of us dollars) is 162.50, what is the GDP?
SQL: SELECT MAX("GDP per Emissions (in US dollars per ton)") FROM "1-2508175-1" WHERE "GDP (current, in billions of US dollars)" = '162.50';