In this paper, it is tried to give an overview on application technologies using fibrous materials contributing to environmental and resource matters, such as i) thermal insulations, ii) parts of energy devices, iii) elements related to energy sources, iv) lightening of transportation vehicles, v) energy saving through clothing, bed clothing, interior and exterior, vi) water treatment and purified water production, vii) separation between oil and water, viii) air purification, ix) enclosure of contaminated substances.