It also has been exporting its power and industry segment products and services for over 40 years. BHEL's global references are spread across over 76 countries across all the six continents of the world. The cumulative overseas installed capacity of BHEL manufactured power plants exceeds 9,000 MW across 21 countries including Malaysia, Oman, Iraq, UAE, Bhutan, Egypt, and New Zealand. Their physical exports range from turnkey projects to after sales services. Initiatives BHEL's investment in R&D is amongst the largest in the corporate sector in India. During 2012–2013, the company invested about ₹1,252 Crore on R&D efforts, which corresponds to nearly 2.50% of the turnover of the company, focusing on new product and system developments and improvements in existing products. The IPR (Intellectual Property Rights) capital of BHEL grew by 21.5% in the year, taking the total to 2170. The corporate R&D division at Hyderabad leads BHEL's research efforts in a number of areas of importance to BHEL's product range. Research & product development (RPD) groups for each product group at the manufacturing divisions play a complementary role. BHEL has established Centres of Excellence for Simulators, Computational Fluid Dynamics, Permanent Magnet Machines, Surface Engineering, Machine Dynamics, Centre for Intelligent Machines and Robotics, Compressors & Pumps, Centre for Nano Technology, Ultra High Voltage Laboratory at Corporate R&D; Centre of Excellence for Hydro Machines at Bhopal; Power Electronics and IGBT & Controller Technology at Electronics Division, Bengaluru, and Advanced Fabrication Technology and Coal Research Centre at Tiruchirappalli. BHEL has established four specialized institutes, viz., Welding Research Institute (WRI) at Tiruchirappalli, Ceramic Technological Institute (CTI) at Bangalore, Centre for Electric Traction (CET) at Bhopal and Pollution Control Research Institute (PCRI) at Haridwar. Amorphous Silicon Solar Cell plant at Gurgaon pursues R&D in Photo Voltaic applications. BHEL is one of the only four Indian companies and the only Indian public sector enterprise figuring in 'The Global Innovation 1000' of Booz & Co., a list of 1,000 publicly traded companies which are the biggest spenders on R&D in the world. Criticism BHEL is selected to construct 1340-megawatt Rampal coal power plant in Rampal Upazila, Bangladesh, which is close to the Sundarbans mangrove forest. The power plant is set up by Bangladesh-India Friendship Power Company Pvt. Limited — a joint venture between NTPC Limited and Bangladesh Power Development Board. The project has faced criticism for the environmental impact and the potential harm to the largest mangrove