Consider the following statements regarding the National Mission on Natural Farming (NMNF):

1. NMNF is a Centrally Sponsored Scheme under the Ministry of Agriculture & Farmers' Welfare.

2. Farmers will practise Natural Farming (NF) as a chemical-free farming method, which involves the use of advanced agrochemical inputs and monoculture cropping systems.

3. In the next two years, NMNF will be implemented in 15,000 clusters in Gram Panchayats, aiming to reach 1 crore farmers.

4. Farmers will be provided with an easy and simple certification system to access markets for their natural farming produce.

How many of the above statements are correct?