To mark World Day Against Child Labour on June 12, Guardian Sustainable Business ran an online discussion to explore tackling the root causes of child labour with readers and four expert panellists. Marianne Barner, Ikea's senior advisor on sustainability and Joanne Dunn, a senior protection advisor on child labour at UNICEF, joined Carmel Giblin, general manager at Sedex – an information exchange on labour standards and business ethics – and Julia Kilbourne, who leads the apparel and textiles department at the Ethical Trading Initiative (ETI).