•   A salt lake is a landlocked body of water that has a concentration of salts and other dissolved minerals significantly higher than most lakes.

•   Playas are small lakes with flat floors and undrained basins. Here,  water is collected after rainfall and evaporates quickly are called playas.

•   Didwana is a salt-water lake in Nagaur district of Rajasthan.  

•   Kuchaman lake occupies an area of about 8.5 sq. kms in Nagaur District of Rajasthan. It is also a saline lake.

•   Sargol and Khatu are also salt lakes.

•   Didwana is the temporary district headquarters for Didwana-Kuchaman district in Rajasthan. It is  known as the lion gateway of Marwar and the archway of Merta.

•   ​Didwana lake is a playa. Other such playas are the Kuchaman, the Sargol and the Khatu lakes.

•   Kuchaman Lake is a saltwater lake located near Kuchaman City in Rajasthan's Nagaur District.

•   The city is home to a fort and several Havelis constructed in the Shekhawati style.

•   The fresco art in the Havelis showcases Hindu mythology and floral motifs.

 ● Sargol Lake is a prominent water body located in the Kashmir Valley of Jammu and Kashmir, India.  
      ○ It is situated at an elevation of approximately 3,500 meters above sea level.
      ○ The lake is known for its pristine waters and picturesque surroundings, attracting tourists and nature enthusiasts.
  ● Sargol Lake is fed by the melting snow from the surrounding Himalayan ranges.  
      ○ The lake is a part of the Himalayan ecosystem, supporting diverse flora and fauna.
      ○ It is a crucial source of water for the local communities and wildlife in the region.
      ○ The area around the lake is characterized by alpine meadows and coniferous forests.
  ● Sargol Lake is accessible via trekking routes, making it a popular destination for adventure seekers.  
      ○ The lake is also significant for its biodiversity, hosting various species of fish and migratory birds.
      ○ It is under the jurisdiction of the Jammu and Kashmir Forest Department for conservation and management.

•   It is located in Rajasthan.

•   A glacier is a persistent body of dense ice.

•   Glacial ice is the largest reservoir of fresh water on Earth, holding with ice sheets about 69 percent of the world's freshwater.

•   The Himalayan region of India is home to some of the most notable glaciers in the world, including the Siachen Glacier, the second-largest non-polar glacier on Earth and the largest glacier in India.

•   India has 16,627 glaciers.

•   Important glaciers include: Bichom Glacier, Bara Shigri Glacier, Zemu Glacier, Rathong Glacier, Lonak Glacier, Bandarpunch, Milam Glacier etc.

•   These are productive wetlands that occur in coastal intertidal zones.

•   Mangrove forests grow mainly at tropical and subtropical latitudes because mangroves cannot withstand freezing temperatures.

•   Mangrove forests stabilize the coastline, reducing erosion from storm surges, currents, waves, and tides.

•   The intricate root system of mangroves also makes these forests attractive to fish and other organisms seeking food and shelter from predators.

•   The major mangroves in India are found at: Sundarban Groves, Mahanadi Mangroves, Krishna Godavari Mangroves, Mangroves of Gujarat, Ratnagiri Mangroves, Goa Mangroves, Cauvery Deltaic Mangroves, Andaman Nicobar Mangroves.

•   These are wetlands deemed to be of "international importance" under the Ramsar Convention.

•   In 2022, Twenty-Six new sites were added that includes Karikili Bird Sanctuary, Pallikaranai Marsh Reserve Forest & Pichavaram Mangrove from Tamil Nadu, Pala wetland from Mizoram, Sakhya Sagar from Madhya Pradesh.

•   The five new Ramsar sites added in 2023 are Ankasamudra Bird Conservation Reserve in Karnataka, Aghanashini Estuary in Karnataka, Magadi Kere Conservation Reserve in Karnataka, Karaivetti Bird Sanctuary in Tamil Nadu and Longwood Shola Reserve Forest in Tamil Nadu.

•   Currently, there are 80 Ramsar sites in India.

•   Tamil Nadu has the highest number of Ramsar Sites in India with 14 Ramsar Sites.