def METHOD_NAME(self):
    df = self.df_gas
    section_start = df.loc[
        df.iloc[:, 0] == "GHG emissions, Gg CO2 equivalent"
    ].index[0]
    start_index = df.index[df.iloc[:, 0] == "GHG emissions without LULUCF / LUCF"][
        0
    ]
    end_index = df.index[(df.iloc[:, 0] == "Total GHG") & (df.index > start_index)][
        0
    ]
    df_out = df.loc[start_index + 1 : end_index].set_axis(
        df.iloc[section_start, :], axis=1
    )
    df_out["year"] = df_out["year"].astype(int)
    df_out["iso3"] = self.iso3
    df_out["iso2"] = self.iso2
    return df_out