PRESS RELEASE:EARTH DAY BROADCAST “SOUTH CENTRAL FARM: OASIS IN A CONCRETE DESERT, ”documentary short, airing in “Natural Heroes”PBS series in Los Angeles on April 22WHEN: April 22, 2008, 9:30 – 10 PMWHERE: KLCS channel 58 (check local listing)in “Natural Heroes” PBS seriesKLCS, channel 58, a…