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_2508175_1 ( annual_co2_emissions__in_thousands_of_metric_tons_ INTEGER, gdp_per_emissions__in_us_dollars_per_ton_ VARCHAR )

### 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)?

### Accurate SQL ###

SELECT MAX(annual_co2_emissions__in_thousands_of_metric_tons_) FROM table_2508175_1 WHERE gdp_per_emissions__in_us_dollars_per_ton_ = 3903