Consider the following statements about the environmental challenges in Punjab’s agriculture:

1. Excess and imbalanced use of fertilizers in wheat and rice cultivation remains a major problem.
2. Free electricity to farmers has helped in groundwater conservation.
3. Punjab’s declining water table is largely due to over-extraction for irrigation.
4. The Punjab Vision Document 2047 (PVD) prioritizes integrated farming methods to address soil health issues.

Which of the above statements are correct