Guanghua Wan (with microphone), principal economist for the Asian Development Bank, discusses his recent paper Green Urbanization in Asia at the Woodrow Wilson International Center for Scholars on Wednesday. Listening to Wan's presentation on how public policies can help reduce urbanization's environmental impact are Douglas Brooks (seated at far left), assistant chief economist at the ADB, and Wilson Center urban-development expert Blair Ruble, who moderated the seminar. Sun Chenbei / China Daily