Botanists study the biology of plants, fungi and other related organisms, such as lichens and algae. By studying different plants, botanists observe and record the impacts of pollution and human activity, the way plants breed and grow, and the structure and genetic make-up of various species. This knowledge can be used to develop and promote environmental protection programs, improve plant growing techniques, and identify and extract plant products used in medicines, food, fabrics and other products. Some botanists may also search for and classify new plant species. It is also common for botanists to present their findings in scientific reports, which may be published in journals and/or presented as lectures.