TY  - BOOK
AU  - Espejo, Roman
TI  - What is humanity's greatest challenge?
SN  - 9780737743142 (hbk.)
SN  - 200903915
U1  - HN18.3 .W465 2010 306.09/045 
PY  - 2010///
CY  - Detroit
PB  - Greenhaven Press
KW  - Humanity - Juvenile literature
KW  - Social problems - Juvenile literature
N1  - Includes bibliographical references and index
ER  -