1.		Urban air pollution in China: destination image and risk perceptions / Susanne Becken [et al.] Resp- Sec.: Becken, Susanne Jin, Xin Zhang, Chen Gao, Jun
2.		Hydrocarbon pollution in underwater sinkholes of the Mexican Caribbean caused by tourism and asphalt: Historical data series and cluster analysis / José-A. Léon-Borges and M. A. Lizardi-Jiménez Autor: León-Borges, José-A. Coautor: ; Lizardi-Jiménez, M. A.