Please add spaces between words: Hearguesthatthecitycouldspend$100-150milliontoreduceitscoreproblemofpeakwaterrunoffbypromotingporouspavements,greenroofs,andgraywatersystems.
He argues that the city could spend $100-150 million to reduce its core problem of peak water runoff by promoting porous pavements, green roofs, and graywater systems.