What is India's biggest Climate Clock, a question on which was asked in KBC 16?

A question on India's biggest Climate Clock was asked on the recent episode of Kaun Banega Crorepati 16. CSIR, as part of the Earth Day Celebrations, had installed and activated India's biggest Climate Clock on the CSIR Headquarters Building in Rafi Marg, Delhi on April 23, 2024. It shows much time is left before we touch global warming of 1.5°C.