Consider the following statements about the agricultural structure of Punjab:

1. Punjab contributes over 30% of India’s rice procurement and nearly 50% of wheat procurement.
2. The state’s agricultural diversification efforts have been largely successful in reducing wheat and rice dependence.
3. High cropping intensity and excessive groundwater use have contributed to severe environmental concerns.
4. Punjab has witnessed a steady increase in the cultivation of pulses and fruits in the last decade.

Which of the above statements are correct?