Tomato seeds are apparently indestructible, even after sewage treatment. When Seattle bought the Gas Works Park property to create Lake Union’s first park, the soil was too polluted to grow grass, so the city coated the site with sewer sludge. The grass grew well and, during the first summer, an added bonus of tomatoes sprouted in the park. Gas Works Park displays rusting remnants of a 1902 gasification plant that converted coal to liquid fuel for streetlights and cooking stoves. The last gas was made in 1957 when a new pipeline brought natural gas from British Columbia.