Environment is today a major issue in several countries. The changes to ecosystems, reported during the last decade, caused an awakening of the populations and of governments on the need to preserve environment. Therefore, new or stricter regulations on the release of pollutants or greenhouse gases are being implemented all around the world. Consequently, the follow-up and control of pollutants being rejected becomes necessary. Worldwide, the environmental market represents around 800 billion dollars and the global need for environmental technologies, able to control pollution in air, water and soil, is in continuous increase.

We invite authors to submit, for publication, original reviews or research papers conducted at a laboratory, pilot, or industrial scale, and using biological processes. Papers proposing new control technologies will also be accepted. The following areas will be covered by this special edition:

• Air pollution control
• Soil remediation
• Water and wastewater treatment

Before submission authors should carefully read over the journal's Author Guidelines, which are located at http://www.hindawi.com/journals/ijce/guidelines/. Prospective authors should submit an electronic copy of their complete manuscript through the journal Manuscript Tracking System at http://mts.hindawi.com/ according to the following timetable: