Design Green Design Breaking the Law to Make Streets Greener? 8 Smart Guerrilla Urban Improvements (Slideshow) By Paula Alvarado Writer T.E.A. Paula Alvarado is an Argentine journalist who wrote for Treehugger for 7 years. She continues to write about sustainability for various publications. our editorial process Twitter Twitter Paula Alvarado Updated October 11, 2018 Migrated Image Share Twitter Pinterest Email Design Tiny Homes Architecture Interior Design Green Design Urban Design Armed with gardening equipment, white traffic paint, or even a few benches, young (and not so young) activists around the world are taking back the streets to turn our cities into greener, more livable and simply more fun spaces.