Complex sentence: On July 7,2007, Kennedy appeared in New Jersey at the Live Earth event, where he gave a speech challenging the public to question the implied position of the energy industry that economic and environmental policies are mutually exclusive.
Split into simpler sentences: On July 7,2007, Kennedy appeared in New Jersey at the Live Earth event. His speech challenged the public to question the implied position of the energy industry that economic and environmental policies are mutually exclusive.