I felt heartbroken while I was taking this picture. This was a big Rain Tree and I used to spend some time under this tree every day during my evening walk. It is quite refreshing, and the temperature  would be less than 5 degree under its shade compared to the normal temperature outside the shade. The rain trees are good for Carbon Sequestration. Carbon sequestration is the capture and long-term removal of carbon dioxide from the atmosphere. According to research conducted at the School of Forestry of the Bogor Agricultural Institute, Indonesia, a mature rain tree with a crown diameter measuring 15 meters absorbed 28.5 tons of CO2annually. 

Whoever did this to the tree, you are actually sawing off the branch you are sitting.