Chalk

Tea, cinchona, rubber, cardamom, and chalk may appear to be unrelated at first glance, yet each of these materials has played an important role in agriculture, trade, and daily life across different regions of the world. From plantations in tropical climates to classrooms and kitchens, these resources have influenced economies, cultures, and industries for generations. … Read more

In recent years, researchers and students have explored the idea of repurposing eggshells into chalk as a way to reduce waste and create cost-effective educational tools. Since eggshells are a natural source of calcium carbonate, the same primary component found in commercial chalk, the potential of using them in classrooms has sparked curiosity. This innovative … Read more