With reference to nano fertilisers, consider the following statements:

1.Nano fertilisers can improve nutrient uptake efficiency due to their extremely small particle size and higher surface area.

2.Nano Urea is designed to fully replace all conventional nitrogen fertilisers in all agro-climatic conditions.

3.Nano fertilisers may help reduce environmental pollution caused by excess use of chemical fertilisers.

Which of the statements given above is/are correct?