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 Research_outcomes (outcome_description VARCHAR, outcome_code VARCHAR)
TABLE: CREATE TABLE Project_outcomes (outcome_code VARCHAR)

### Question ###
What are the descriptions of all the project outcomes?

### Accurate SQL ###

SELECT T1.outcome_description FROM Research_outcomes AS T1 JOIN Project_outcomes AS T2 ON T1.outcome_code = T2.outcome_code