Concurrently, the Swedish organization TCO Development launched the TCO Certified program to promote low magnetic and electrical emissions from CRT-based computer displays this program was later expanded to include criteria on energy consumption, ergonomics, and the use of hazardous materials in construction. This resulted in the widespread adoption of sleep mode among consumer electronics. Environmental Protection Agency launched Energy Star, a voluntary labeling program that is designed to promote and recognize the energy efficiency in monitors, climate control equipment, and other technologies. Some believe they can and should become climate neutral by 2030. Data centres and telecommunications will need to become more energy efficient, reuse waste energy, and use more renewable energy sources to stay competitive. Yet it is also clear that the environmental footprint of the sector is significant, estimated at 5-9% of the world's total electricity use and more than 2% of all emissions. Many corporate IT departments have green computing initiatives to reduce the environmental effect of their IT operations. Green computing is important for all classes of systems, ranging from handheld systems to large-scale data centers. The goals of green computing are similar to green chemistry: reduce the use of hazardous materials, maximize energy efficiency during the product's lifetime, increase the recyclability or biodegradability of defunct products and factory waste. Green computing, green IT (Information Technology), or ICT sustainability, is the study and practice of environmentally sustainable computing or IT. Environmentally sustainable computing and information technology
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