Development in the technology of sensor such as Micro Electro Mechanical Systems (MEMS), wireless communications, embedded
systems, distributed processing and wireless sensor applications have contributed a large transformation in Wireless Sensor Network
(WSN) recently. It assists and improves work performance both in the field of industry and our daily life. Wireless Sensor Network has
been widely used in many areas especially for surveillance and monitoring in agriculture and habitat monitoring. Environment monitoring
has become an important field of control and protection, providing real-time system and control communication with the physical world.
An intelligent and smart Wireless Sensor Network system can gather and process a large amount of data from the beginning of the
monitoring and manage air quality, the conditions of traffic, to weather situations. In this paper, we discuss and review wireless sensor
network applications for environmental monitoring. In order to implement a good monitoring system, there are several requirements to be
followed. From the studies, it has been proved to be an alternative way to replace the conventional method that uses men force to monitor
the environment. It is also proven that these approaches can improve the system performance, provide a convenient and efficient method
and can also fulfill functional requirements.