Stories by Gene E. Likens

Emissions of acidic air pollutants have fallen dramatically. Why is acid rain still a problem? Atmospheric dust may be part of the answer

In recent decades the acidity of rain and snow has increased sharply over wide areas. The principal cause is the release of sulfur and nitrogen oxides by the burning of fossil fuels

Life on the earth is sustained by the finite amount of solar energy that is fixed by green plants. Quantitative study of the energetics of a forest has shown how this energy is partitioned and controlled

When all vegetation was cut in a 35-acre watershed in an experimental forest in New Hampshire, the output of water and nutrients increased. The experiment illustrates ecological principles of forest management