def pollutants_per_country(summary):
    """
    Get the available pollutants per country from the summary.

    :param list[dict] summary: The E1a summary.

    :return dict[list[dict]]: All available pollutants per country.
    """
    output = dict()
    for d in summary.copy():
        country = d.pop('ct')
        if country in output:
            output[country].append(d)
        else:
            output[country] = [d]
    return output
