The effects and risks of chemicals for the environment have to be assessed in order to secure different human requirements and limit their influences on the ecosystem. Since the terrestrial environment is associated with the atmosphere and the aquatic systems there is a need to conduct risk assessments for plants, soil-dwelling organisms, invertebrates and vertebrates in terrestrial and aquatic surroundings. Additionally, accumulation of toxic compounds in food items and through the food chain have to be considered. The frame for the assessments are given by the regulatory bodies. 
Our company has experience with most of the required tests for plant protection products.