 The act was an attempt to clean up water tainted with phosphorus runoff leaving sugarcane fields and pumped into the Everglades.
<meaning-changed>  The act was an attempt to clean up water tainted with phosphorus runoff leaving sugarcane fields and pumped into the Everglades.
 The act was an attempt to clean up water tainted with phosphorus , a component of fertilizer, which runs off the sugarcane fields and pumped into the Everglades.