Roads imperil South American protected areas Santiago A. Schauman; Esteban G. Jobbágy; Josep Peñuelas; William F. Laurance; Germán Baldi;

Insufficient protection and intense human pressure threaten islands worldwide Javier Nori; Fabricio Villalobos; Luis Osorio-Olvera; Rafael Loyola;

Minimum costs to conserve 80% of the Brazilian Amazon José Maria Cardoso da Silva; Luís Claudio Fernandes Barbosa; Julie Topf; Ima Célia G. Vieira; Fabio R. Scarano;