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