The third major change is the concentration of activity in Washington, D.

NPR: Intelligence Failures In 'Top Secret America'

Another change is the concentration of the growing populations.

CNN: STORY HIGHLIGHTS

There are two main incentives for this, the first being the geological feature that natural gas is in finite supply and world production of it is thought might peak within the next few decades, and secondly that burning fossil carbon contributes to the atmospheric concentration of CO2, which scientific consensus accords will cause global warming and climate change.

FORBES: U.K. Joins Europe On Biogas 'Waste Into Energy' Strategy

Institutional resistance to change is less rigid than it was, with more doctors and specialist nurses accepting the need for concentration of expertise and services, rather than emphasising the numbers of hospitals and beds.

ECONOMIST: Hospital takeovers