Afforestation is a special way of planting lots of new trees in a place that didn't have a forest before. It is like giving the Earth a big green hug! When we plant trees, they help us in many important ways. Trees act like big air cleaners, breathing in the air that is not good for us and making fresh, clean air for everyone to breathe. Their roots act like strong glue, holding the soil together so it does not wash away when it rains. Forests also become cozy homes for many animals like birds, squirrels, and insects, helping to keep nature balanced. By practicing afforestation, we help fight big problems like climate change and make our world a much healthier, happier, and greener place to live for everyone.