An appeal will be dismissed under section 21A of the Supreme Court Act 59 of 1959 where the judgment or order sought will have no practical effect or result. Where an appellant concedes that the factual circumstances underlying the appeal have changed such that the relief sought has become academic (in this case, no draw-down on underground water was occurring and the environmental authorisation remained in force), the appeal becomes moot and must be dismissed. When such a concession is only made at the commencement of proceedings after questioning by the court, and where the issues raised in heads of argument were complex and involved, the court may award costs of two counsel against the unsuccessful appellant.