[2026] PTE Academic Listening - Fill in the Blanks (Type In)

The development of modern refrigeration in the late nineteenth century revolutionized the food industry and global trade. Before this , preserving food relied on traditional methods like salting, smoking, or using ice harvested from lakes. The invention of mechanical cooling allowed for the long-distance transport of perishable goods, such as meat and dairy. This transition facilitated the growth of farming regions and led to a more diverse diet for consumers worldwide. Furthermore, refrigeration became a vital of the medical industry, enabling the storage of life-saving vaccines and medicines. However, early cooling agents were often or flammable, leading to the development of safer alternatives. Today, the focus has shifted toward improving the energy of cooling technologies to reduce their environmental impact.