Search

The article focuses on the need for environmental awareness in the U.S. It informs that the U.S. President Richard Nixon has expressed the need for environmental awareness in his State of the Union Message. It tells that the U.S. environment is threatened by the garbage of the world's richest economy. It states that for maintaining the ecological balance, all ecosystems need four key elements, that are, inorganic substances, plants, animal consumers and decomposers. It also informs that nitrogen fertilizers have been spread on California's superb farm lands for increasing crop production.