Polish climate causes that costs of heat energy used for heating andpreparation of usable, hot water make significant part of financial resources in buildingsmaintenance. Focusing mainly on limitation of carbon dioxide emission and improvementof heat energy efficiency, worlds’ tendencies of...

Organizing major sporting events is inextricably linked with reducing therisks. These risks may be caused by the uncontrolled behavior of the crowd, different typeof accidents or hardware failure as well as terrorist threats. Other main factors creatingdangers currently can be included: problems...