The two major challenges for the 21st century are to improve the economic situation of the majority and save as much of the planet as we can.

The great challenge of the twenty-first century is to raise people everywhere to a decent standard of living while preserving as much of the rest of life as possible.

Green-tech could be the largest economic opportunity of the 21st Century.

The 21st century simply means open century.

There's so much in the 21st century that is stymied by bureaucracy and mediocrity and committee.

It's important to move the theatre into the 21st Century.