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In the 21st century, ever increasing energy and environmental problems such as pollution, fossil fuel depletion and global warming are ringing the alarm bell to human society. Therefore, clean and renewable energy materials as well as their devices are urgently demanded. In this paper, we first give the definition of environmental sustainability, then the forms of energy sources and its sustainability and environmental impact are discussed. Finally, the main characteristics of hydrogen storage as well as carbon materials and solar energy materials are expounded.

Protecting Environmental Sustainability by Use of Energy Materials