engineer nathan faber shows us the plant. ws it's energy intensive, a target for criticism from environmental activists. but he also knows there's no alternative. nathan: i could be surfing in the ocean and two hours later, the water is converted to drinking water and going to the residents of san diego county. reporter: two hours? nathan: two hours. reporter: the plant turns 190 million liters of seawater into drinking water for the region every day. it flows through 16,000 filters in this pipe, in a process called reverse osmosis. it's one strategy of many for securing enough fresh water. nathan: since the 1990's, our per person water use has dropped in half. even though our population has increased and we've had these stressors like climate change and drought. one of the main factors is education. teaching people, and san diego county residents how to use less water and be more efficient. so with irrigation, with showers, really just changing their attitudes towards water use. reporter: the city oversees 500 kilometers of p

if there's a leak anywhere, nathan faber is convinced that the measure is being taken by the city work well together. it's extremely critical. the stress test showed that until 2045, and maybe even beyond that, the region has adequate supply. we've invested in storage, we've invested in desalination. we looked at recycled water, collecting water and purifying it next to saving water. it's the issue in the san diego region, especially because it only gets around $25.00 centimeters of rain per year. emily and chris ear save every drop in 2 large tanks. that's enough to take care of their garden. they've created a green oasis with lots of fruit and vegetables. i fear for the day we're, this is the only way to go where we have to grow our own food because there's going to be such water shortages in the future, especially in the western states here. this is an ongoing crisis out here. so it's, it's, makes a ton of sense to, to use water intelligently garden, designer brooks, arson installed and irrigation system. under chris and emily's beds that transports water from the house, directly to

nathan faber is convinced that the measure is being taken by the city work well together. it's extremely critical. the stress test showed that until 2045, and maybe even beyond that, the region has adequate supply. we've invested in storage, we've invested in desalination. we looked at recycled water, collecting water and purifying it next to saving water. it's the issue in the san diego region, especially because it only gets around $25.00 centimeters of rain per year. emily and chris ear save every drop in 2 large tanks. that's enough to take care of their garden. they've created a green oasis with lots of fruit and vegetables. i fear for the day we're is the only way to go where we have to grow our own food because there's going to be such water shortages in the future, especially in the western states here. this is an ongoing crisis out here. so it's, it's, makes a ton of sense to, to use water intelligently garden, designer brooks, arson installed and irrigation system. under chris and emily's beds, the transports water from the house, directly to the fruit trees, how

like engineer nathan faber shows us the plant, see that he knows its energy intensive, a target for criticism from environmental activist. but he also knows there's no alternative and also i could be surfing in the ocean, and 2 hours later, the water is converted to drinking water and going to the residence of san diego county. wow, it's 2 hours. the plant turns 190000000 leaders of sea water into drinking water for the region every day. it flows through 16000 filters in this pipe in a process called reverse osmosis. is one strategy of many for securing enough fresh water. so since the ninety's are parson, water use has dropped in half, even though our population increase. and we've had these suppressors like climate change in route, one of the main factors is education. teaching people in san diego county resident audit use less water and be more efficient. so with irrigation, which showers really just changing their attitude toward the water? use the city overseas, 500 kilometers of pipes, using sensors that found an alarm if there's a leak anywhere. nathan favor is convinced that the measu