CREATE TABLE table_2508175_1 (country VARCHAR2, annual_co2_emissions__in_thousands_of_metric_tons_ VARCHAR2)

when the annual co2 emissions (in thousands of metric tons) is 1811, what is the country?
SELECT country FROM table_2508175_1 WHERE annual_co2_emissions__in_thousands_of_metric_tons_ = 1811
SELECT "country" FROM "table_2508175_1" WHERE "annual_co2_emissions__in_thousands_of_metric_tons_" = 1811