ผู้เขียน: G.W. Heil

The main activities of the economically active population around The Iztaccihuatl and Popocatepetl volcanoes region lie in the primary sector (65- 90%). Of the people working in this sector, those de …

Increased atmospheric nitrogen deposition and changes in the management of heathlands have caused a significant change in the species composition of the NW-European heathlands. This change from erica …