Implementation of the Endangered Species Act is crucially dependent upon what constitutes a species.
Countries such as the U.S., are likely engaging in much frivolous consumption of energy without benefits to health and happiness.
Recent work…has shown that butterflies have declined at a rate of about 1.6% per year during the past 40 years.
The shape and volume—not just area—of trees growing in a forest creates an added dimension to the ecological and evolutionary setting.
Don’t let statistics of declining pesticide use fool you
the communities of plants worldwide are no longer “natural.”
For Right Whales, the situation is dire, and extinction is the moral equivalent of murder
Only with a population growth rate of zero might we have some hope for planetary stability.
Reducing the use of disposal diapers would have a rather small effect on our national inventory of greenhouse gas emissions
We need to enhance natural processes that can accelerate diversification and allow emerging habitats to select the winners.