A modern discipline
Environmental science is like the other sciences a discipline where knowledge is generated by finding, organising, measuring, and by establishing laws by hypothesis formulation and testing and making models.

Use of solar power is better than charcoal in forest village, northern Bangladesh? Foto: V.Pietik 2009
Environmental science is a quite modern discipline and a rapidly growing field. One objective of environmental science is to understand the systems and the relationship between the man-made world and the natural environment. By knowing how the environment works, ground rules can be developed for how to deal with the environment more effectively in the future.
We are part of nature
Environmental science studies the physical systems (rocks, soil and water), ecological systems (plants animals and other life forms inhabiting the planet) and chemistry (the substance flow on Earth, contamination and toxics) (Rydén ed. 2003).
Environmental knowledge takes into account that we are a part of nature. One definition of environmental science is that it is the interface between society and nature since it studies the impact of humans on nature and vice versa.

Why is recycling still not fully developed? Why still dumpsites? This one from Lithuania, photo: V.Pietik 2009
Environmental problems calls for new methods in risk prediction
Within the environmental science the new characteristics of risk, risk management and the risk society (Beck 1992) are of a specific nature.
Scientific methods change by time and the contemporary features of many environmental problems calls for new methods for example in risk prediction. I dare say that one of the specific characteristics of environmental science is the reflection on the growing concern about the impact of human activity on the natural world.