What is second green revolutions?

Explanation

### Step-by-Step Solution:

1. **Understanding the Green Revolution**:
- The term "Green Revolution" refers to a series of research, development, and technology transfer initiatives that occurred between the 1940s and the late 1960s. It aimed to increase agricultural production worldwide, particularly in developing countries.

2. **First Green Revolution**:
- The first Green Revolution primarily focused on the use of high-yielding varieties (HYVs) of crops, along with increased use of chemical fertilizers and pesticides. This revolution significantly boosted crop production, especially in countries like India and Mexico. Key features included:
- Introduction of high-yielding varieties of staple crops (e.g., wheat and rice).
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