The speaker is demonstrating a gardening technique to the audience.
This is the perfect gardening hack for growing new trees. It's called air layering, and it's super easy. This man scrapes a ring around a branch. Then he takes the bottom of a plastic bottle, fills it with soil, and secures it around the cut. With some water and patience, roots start growing inside. A few weeks later, you'll see fresh white roots ready to plant. It's a simple trick anyone can try at home with their own plants.
Este truco de jardinería para cultivar nuevos árboles es el acodo aéreo. Es fácil. El hombre raspa un anillo en la rama. Toma el fondo de una botella, la llena de tierra y la asegura al corte. Con agua y paciencia, las raíces crecen dentro. Semanas después, verás raíces blancas, listas para plantar. Es un truco sencillo para sus propias plantas.