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_2780146_6 ( hc__g_kwh_ VARCHAR, standard VARCHAR )

### Question ###
What's the HC for the Euro I standard?

### Accurate SQL ###

SELECT hc__g_kwh_ FROM table_2780146_6 WHERE standard = "Euro I"