Solution:

• Global warming is the long-term heating of Earth’s climate system observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth’s atmosphere.
• The Green Revolution in India refers to a period in India when agriculture was converted into an industrial system due to the adoption of modern methods and technology, such as the use of high yielding variety (HYV) seeds, tractors, irrigation facilities, pesticides, and fertilizers.