Complex sentence: He is considered an expert on matters related to climate change and the flooding of London, he was invited to the'London Under Water' lecture from the Royal Geographic Society's' 21st Century Challenges' series in June 2008.
Split into simpler sentences: He is considered an expert on matters related to climate change and the flooding of London. He was invited to the'London Under Water' lecture from the Royal Geographic Society's' 21st Century Challenges' series in June 2008.