. >> i have seen some very close calls here on the rocks at sharks cove.ng is about this area on the north shore is when the waves come in, you don't know they're coming until they're there. >> february 5th, 2011. drew and a group of conversation volunteers are keeping a look on the waves. >> we're here every saturday to help provide information to the public and protect the marine life area. we watch the fish and watch the people. >> in the wintertime there are a lot of visitors that come here to see the rocks with the explosion of white water. it's a common sight to have people taking photos here. >> on this particular day, a pair of tourists mother and son will get more than a view of the waves. >> when i first saw the couple walk out on the rocks i initially tried to warn them as did several other people on the shoreline. >> our first instinct was to yell at them and warn them because the waves were crashing over the rocks but they of course couldn't hear us. >> the tourists are unaware that the waves in this area can be extremely unpredictable. waves

cove. >>> and tonight, "last man standing" followed by "christella," "shark tank," and "20/20."1:00. >>> there's a saying i've heard a long time ago that has stayed with me -- waste not, want not. first recorded in 1772 the meaning is as relevant today as it was then. use our resources wisely and we will not lack them in the future. going green is in vogue now that's a good thing. in recent years we've done a better job of recycling cans cardboard, and plastic than we used to. remember we pitched that into the trash? we've made progress burks we still waste a staggering amount of food. far more than plastic paper, metal, or glass. san francisco is further ahead than most cities, setting a goal of zero waste sent to landfills by 2020. in seattle, a new law just took effect to publicly shame those who throw too much food away by red tagging their bins for all to see. people in that city alone send 100,000 tons of food to landfills every year just in seattle. i'm not sure if that scarlet letter approach is the answer, by-law really matters is that we make the same serious changes i

cove. >>> and tonight, "last man standing" followed by "christella," "shark tank," and "20/20."1:00. >>> there's a saying i've heard a long time ago that has stayed with me -- waste not, want not. first recorded in 1772 the meaning is as relevant today as it was then. use our resources wisely and we will not lack them in the future. going green is in vogue now that's a good thing. in recent years we've done a better job of recycling cans cardboard, and plastic than we used to. remember we pitched that into the trash? we've made progress burks we still waste a staggering amount of food. far more than plastic paper, metal, or glass. san francisco is further ahead than most cities, setting a goal of zero waste sent to landfills by 2020. in seattle, a new law just took effect to publicly shame those who throw too much food away by red tagging their bins for all to see. people in that city alone send 100,000 tons of food to landfills every year just in seattle. i'm not sure if that scarlet letter approach is the answer, by-law really matters is that we make the same serious changes i