David Pimentel

TL;DR: About 42% of the species on the Threatened or Endangered species lists are at risk primarily because of alien-invasive species.

TL;DR: Aproximately 50,000 nonindigenous (non-native) species are estimated to have been introduced to the United States, many of which are beneficial but have caused major economic losses in agriculture, forestry, and several other segments of the US economy, in addition to harming the environment.

TL;DR: With the addition of a quarter of a million people each day, the world population's food demand is increasing at a time when per capita food productivity is beginning to decline.

TL;DR: In this article, the authors discuss the relation between economic growth and environmental quality, and the link between economic activity and the carrying capacity and resilience of the environment, and they discuss the role of economic activity in environmental degradation.

TL;DR: Energy outputs from ethanol produced using corn, switchgrass, and wood biomass were each less than the respective fossil energy inputs as mentioned in this paper, and the same was true for producing biodiesel using soybeans and sunflower, however, the energy cost for producing soybean biodiesel was only slightly negative compared with ethanol production.