Complex sentence: The construction of thousands of offshore wind turbines, planned in different areas of North Sea, is known to cause displacement of porpoises from the construction site, J. Carstensen, O. D. Henriksen, and J. Teilmann (2006).
Split into simpler sentences: The construction of thousands of offshore wind turbines is being planned in different areas of North Sea. Construction is known to cause displacement of porpoises from the construction site, J. Carstensen, O. D. Henriksen, and J. Teilmann (2006).