Revenue growth is the most sustainable source of earnings growth.

"From this point of view the Pyramids are the most sustainable buildings in history," he said.

Long-term strategies by the national government in conjunction with development agencies are believed to offer the most sustainable results.

Long-term strategies by national governments in conjunction with development agencies were said to offer the most sustainable results.

This, he believes, is the most sustainable way to ensure that workers' lives improve.

The University of Connecticut is also ranked as the most sustainable campus in the world.

Cans are probably the most sustainable type of food packaging.

The extended impact assessment has identified the proposed policy options as the most sustainable from an economic, social and environmental viewpoint.

The most sustainable form of travel is the train.

In its ambition to become the most sustainable global economy it must devise a new energy vision for Europe.