Why are there many poplars planted in Inner Mongolia?

Most poplars are planted in Inner Mongolia, because poplars are drought-tolerant plants and adapt to the dry and windy weather in the north. China returned farmland to grassland in Inner Mongolia to urgently control the environment on the Loess Plateau. It is difficult to grow other trees, or it is too slow to become wood. Only poplar is cold-resistant and drought-resistant, with strong wind and sand prevention ability, strong soil consolidation ability, high survival rate, fast growth, low planting cost and certain economic benefits. Poplar is the main tree species in the construction of "Three North Shelterbelt System".