ABSTRACT
Environmental factors have significant effects on the growth and devel-opment of plants. Climate change is responsible for the variation in environmental conditions of different areas differently. The environmental circumstances like frequency and intensity of weather events, such as hurri-canes, storms, floods, and droughts are life-threatening. These events might affect the flora and fauna of the place and also affects environmental factors such as atmosphere, water, temperature, light, fire, nutrients, grazers, and so forth. Change in environmental conditions has the effect on the habitat and growth of plants. The environmental factors have significant effects on the chemical constituents, generally on plant secondary metabolites. These plant constituents are responsible for biological and pharmaceutical activities. The results reveal that environment has the significant effects on the plant phenology, secondary metabolites, and biological properties of medicinal plants. This chapter describes the effects of environmental factors on the chemical constituents and biological characteristics of some medicinal plants.
