Costs & Benefits of Preserving Nature

Mother Jones:

"A global effort to prevent all future species extinctions would cost about $80 billion a year, or $11.42 annually from every person on the planet, according to a study published last week in Science."

Scientific American:

"More specifically, the study finds that lowering the extinction risk for all of the species that are currently known to be threatened would cost the first $4 billion per year. Protecting and managing key habitats would cost an additional $76.1 billion."