def subset_rcmip_scenario(rcmip_df, scenario):
    """
    Get a subset of the master RCMIP input emissions dataframe for a specific
    scenario
    
    Params
    -------
    rcmip_df : Pandas DataFrame
        RCMIP master input emissions dataframe
    scenario : str
        Name of the scenario to subset
        
    Return
    -------
    Pandas Dataframe
    """
    scenario_df = rcmip_df.loc[(rcmip_df['Scenario'] == scenario) &
                               (rcmip_df['Region'] == 'World')].copy()
    return scenario_df