Food security is ensured in a country when the three dimensions of food security are taken care of. The three dimensions are:
Availabilityof food - Presence of enough food for all the persons
Accessibilityof food - Absence of barrier on access to food
Affordabilityof food - Capability of all persons to buy food of acceptable quality

A large section of people suffer from food and nutrition insecurity in India. However, the worst affected groups areas follows:
→ Landless and land-poor households, traditional artisans, providers of traditional services, petty self-employed workers and destitute including beggars (in the rural areas).
→ People employed in ill-paid occupations and casual labourers engaged in seasonal activities (in the urban areas).
→ People belonging to the backward sections of society, namely SCs, STs and OBCs
→ People belonging to economically-backward states with high incidence of poverty, tribal and remote areas and regions more prone to natural disasters.
→ People affected by natural disasters who have to migrate to other areas in search of work.
→ Large proportion of pregnant and nursing mothers, and children under the age of 5 years.

The economically-backward states with high incidence of poverty are more food insecure in India. The states of Uttar Pradesh (eastern and south-eastern parts), Bihar, Jharkhand, Orissa, West Bengal, Chattisgarh, parts of Madhya Pradesh and Maharashtra account for the largest number of food insecure people in the country

In the late 1960s, the Green Revolution introduced the Indian farmer to the cultivation of high-yielding varieties (HYVs) of seeds. The HYVs (coupled with chemical fertilisers and pesticides) led to a growth in the productivity of food grains (especially wheat and rice), thereby helping India attain self-sufficiency in food grains. Since the advent of the Green Revolution, the country has avoided famine even during adverse weather conditions.

Despite large increase in foodgrain production we find people without food in India. Poor people suffer from chronic hunger. They find themselves unable to buy food. Over one-fifth of the country’s population still suffers from chronic hunger.