Prince Sattam Ibn Abdulaziz, the Acting Governor of Riyadh Province, who is also the Chairman of Riyadh\'s Supreme Committee on Environment chaired here yesterday the Committee\'s 7th meeting. The Acting President of the Committee\'s Center for Projects and Planning Eng. Ibrahim Bin Mohammed Al-Sultan said the meeting dealt with in-depth discussions on programs and plans for the protection of the environment in Riyadh including the rehabilitation and improvement of environmental and urban situations, the experimental operation of 15 monitoring stations of air pollution, and the treatment of medical waste.