IT is an unfortunate fact of nature that during periods of cold weather, such as the one we are currently enduring, there tends to be little wind. At the same time there’s an increased demand for electricity.

AS a former scientific secretary of the International Commission on Radiological Protection I am concerned at the very high levels of radon found in some parts of the country (September 17).

JOHN SWEENEY of NUI Maynooth warns us of the impending shortage of water, especially on the east coast (April 28).