One in four people in Silicon Valley are at risk of hunger, researchers at the Second Harvest food bank have found. Using hundreds of community interviews and data modeling, a new study suggests that 26.8% of the population – almost 720,000 people – qualify as “food insecure” based on risk factors such as missing meals, relying on food banks or food stamps, borrowing money for food, or neglecting bills and rent in order to buy groceries. Nearly a quarter are families with children. “We call it the Silicon Valley paradox,” says Steve Brennan, the food bank’s marketing director. “As the economy gets better we seem to be serving more people.” Since the recession, Second Harvest has seen demand spike by 46%.