Is there somewhat of a study or some type of assessment on the psychological costs on the soldiers to go into combat again and the possibility to do more combat?

WHITEHOUSE: Press Briefing

Scientists have known for a long time that aerosols cool climate by reflecting sunlight and making clouds brighter, but the new study is the first to use a global model to estimate the net effects on plant carbon intake resulting from this type of atmospheric pollution.

CNN: Study: Pollution helps plants absorb C02

They are concentrating on a study of stable isotopes - atoms of the same type but with different masses - and trace elements in the birds' feathers.

BBC: Feathers clue to warbler's travels

Tom Dargie, who runs Boreas Ecology argues that the 1972 study was based was a different type of peatland which is much wetter, and therefore inappropriate for calculating impacts on the Lewis peatlands.

BBC: NEWS | Science/Nature | High stakes for wind farm plans

" Concurs Robert Litan, a Brookings Institution economist who has completed a study of ATM fees for the American Bankers Association: "There is no justification for imposing surcharge bans on any type of ATM owner.

CNN: The War on ATM Fees