Complex sentence: Ferri proposed, first as a community lobbyist in 1988, that the landfill's life should not be extended beyond its planned closure in 1993, and responded unambiguously when the province later proposed a lengthy extension well into the 21st century.
Split into simpler sentences: Ferri proposed, first as a community lobbyist in 1988, that the landfill's life should not be extended beyond its planned closure in 1993. He responded unambiguously when the province later proposed a lengthy extension well into the 21st century.