前言 unit 1 introduction of environmental engineering and science reading material a what is environmental research? reading material b environmental engineering: training for the next round unit 2 finding solutions for tough environmental problems reading material a meeting china's water shortage crisis: current practices and challenges reading material b nanoscale environmental science and technology: challenges and opportunities unit 3 climate change and the greenhouse effect reading material a climate change and air quality--measures with co-benefits in china reading material b speech on world petroleum congress sustainability luncheon about climate change unit 4 overview on ecological restoration reading material a opportunities for integrating ecological restoration & biological conservation within the ecosystem approach reading material b biodive