Paul R. Ehrlich

TL;DR: The challenge of sustainable development is one of developing “economic, social, and governance systems capable of ending poverty and achieving sustainable levels of population and consumption while securing the life-support systems underpinning current and future human well-being”.

TL;DR: Colorado populations of herbaceous perennial lupines show three distinct patterns of amounts, kinds, and individual variability of inflorescence alkaloids, interpreted as alternative chemical defense strategies related to the susceptibility of populations to attack by larvae of a small flower-feeding lycaenid butterfly, Glaucopsyche lygdamus.

TL;DR: Although scientists understand the general directions in which humanity should be moving to solve its environmental problems, the policy response of society remains pathetic and the cutting edge of the environmental sciences is now moving from the ecological and physical sciences toward the behavioral sciences, which seem to have the potential to develop ways to improve that response.

TL;DR: Global animal and plant species diversity is badly underestimated even in well studied taxa, which implies even greater threats to ecosystem services and human well-being than previously assumed, and an increased need to explore, understand, and conserve Earth's living resources.

TL;DR: It is concluded that intrinsic factors play the major role in limiting movement in the checkerspot butterfly Euphydryas editha and the few available data on dispersal are discussed.