Both are critical to producing citizens who can participate effectively in our democratic society, become innovative（創(chuàng)新的)leaders, and benefit from the spiritual enrichment that the reflection on the great ideas of mankind over time provides.

Greenhouse gas emissions, if not properly dealt with, will pose endless risks for mankind.

Such a projection presents mankind with wide-ranging social, economic, environmental and political issues that need to be addressed today to ensure a sustainable future for all.

This nameless person pushed the human race over a historic threshold, for it was in that year that mankind became, for the first time in its history, a predominantly urban species.

tim Joseph was fascinated by the notion that sunlight brings energy and wealth to mankind.