Which of the following statements with regard to the expansion of the desert in Rajasthan is /are correct ?

1. 1The predominant wind direction in Rajasthan is northeast to southwest, so the tendency for desertification has been more in that direction.
2. 2The Thar desert is dominantly a monsoon driven sand desert where wind erosion is a major problem during the summer months. While the Aravalli range is a major bamer in the spread of the desert, rampant mining creating cuts in the range is leading to the spread of the desert.