Environmental science is the science is about physical and chemical activities of environment on different things and organisms and to find the solutions of environmental problems.
Environmental science is one area which includes many other scientific fields like biology, chemistry, etc. Environment science projects have large goals and need vast variety of settings to be carried out.
Environmental engineering deals with projects helpful to reduce pollution in the environment and complete the human needs. For example, water cleaning systems that provide us bacteria free water. So your environment science project can include research on water purification techniques and have the table of observations as a result. Perform test with different methods and observe that which technique takes out all the harmful contents from water. From this you will get to know about best methods to purify water.
Other than this, you can also research about necessary conditions of soil for different crops and most important factors that affects the plant growth. You can also examine the effects of different fertilizers on plants nutrition. This project will increase your interest in soil chemistry and you will get to know about best soil conditions and fertilizers needed for plant growth.
You can do research on efficient use of environmental resources. Finding out the use of waste substances and making useful things from them is called the process of recycling. It is a fun to make new products with waste things. Your environment science project can include gathering data about the occurrence of various recycle products from different substances and making conclusion from this data.
So you can closely study about our environment by performing different kind of environment related science projects.