Participants will either help install a graywater system or a culvert-style cistern at workshops from 8 a.m. to noon, Saturday, April 24. A tour featuring information on reducing utility bills and beautifying an area by managing on-site natural resources will also be featured. $5 suggested donation for the tour; the workshops are free. The events take place in the Rincon Heights Neighborhood. Specific addresses for each event will be provided with RSVPs, which are required. E-mail email@example.com to RSVP. Call 396-3266 for more information.