Elena Vance
Listen to The Water Balance by Elena Vance as a bilingual audiobook with synchronized read-along text in English and Korean.
Maya was a talented engineer who loved solving practical puzzles. She lived in a small valley surrounded by tall green hills. Every morning, she walked to the village innovation center. The center helped local people build smart energy solutions. Recently, a difficult problem had appeared at the community greenhouse. The greenhouse produced fresh vegetables, herbs, and sweet fruits. A large water pump brought water from the river to the crops. The system used clean energy from solar panels on the roof. However, the water pressure was very unstable during the afternoon. When clouds passed over the sun, the pump stopped suddenly. Then, when the sun returned, the water rushed out too quickly. This sudden change was damaging the delicate plant roots. Maya had tried three different electronic control valves already. Unfortunately, the tiny sensors kept breaking in the humid air. The digital circuits were simply too delicate for the warm greenhouse. We need a reliable answer, said Thomas, the greenhouse manager. He handed Maya a cool glass of homemade mint lemonade. If we cannot fix this, the young tomato plants will die, he added.