or (b) that serious pollution of the environment or serious harm to human health has resulted from, or is about to be caused by, the activities to which the licence relates or the happening or threatened happening of an event affecting those activities;
(an event; affecting; those activities) (that serious pollution of the environment or serious harm to human health; is; about to be caused by, the activities to which the licence relates or the happening or threatened happening of an event) (the activities; relates; )
an event that serious pollution of the environment or serious harm to human health the activities
affecting is relates
those activities
about to be caused by, the activities to which the licence relates or the happening or threatened happening of an event