For which one of the following, is Satara well-known?

The correct answer is Option 2: Wind energy plant.

Satara district in Maharashtra is a pioneer and a national leader in wind power generation. It is home to the Vankusawade Wind Park, which was once one of Asia's largest wind farms. The region's unique topography, specifically the high-altitude plateau of Thoseghar and the Chalkewadi area, provides ideal wind velocities required for large-scale energy production.

• Why Option 2 is correct: Satara hosts thousands of Wind Turbine Generators (WTGs), significantly contributing to India's renewable energy capacity.
• Why others are incorrect: While Maharashtra has major thermal (e.g., Chandrapur), hydroelectric (e.g., Koyna), and nuclear (e.g., Tarapur) plants, Satara's primary national identity in the energy sector is specifically tied to its extensive wind farms.

In the context of the UPSC examination, Satara is frequently cited as a classic example of successful renewable energy infrastructure and geographical suitability for non-conventional energy sources.