(a) What is green revolution ? Mention the steps that led to it
(b) Name the scientist whose contribution led to the development of semi-dwarf wheat varieties in India.

Explanation

### Step-by-Step Text Solution

**(a) What is Green Revolution? Mention the steps that led to it.**

1. **Definition of Green Revolution**: The Green Revolution, also known as the Third Agricultural Revolution, refers to a period of significant agricultural transformation that occurred from the 1950s to the 1960s. It aimed to increase food production worldwide to combat hunger and improve food security.

2. **Objectives**: The primary goal of the Green Revolution was to enhance food supply through the introduction of high-yielding varieties (HYVs) of crops, improved agricultural practices, and the use of modern technology.

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