Slash-and-burn is an agricultural practice where trees and vegetation are cut down and burned to clear land for farming. This method is often used in tropical regions, where the soil can be nutrient-rich but quickly depleted. The ash from the burned plants adds nutrients to the soil, making it temporarily fertile for crops. After a few years of farming, the soil's fertility declines, leading farmers to move to a new area and repeat the process. While this technique can provide short-term benefits, it can also lead to deforestation and loss of biodiversity, impacting ecosystems and contributing to climate change.