1 It is known that Geronimo is adopted, as explained in Kingdom of Fantasy II. 2  In the 2004 book La vera storia di Geronimo Stilton, it is mentioned that Geronimo doesn't know who his actual parents are, and that he was adopted by the Stiltons when he was at infant age.
The ecological footprint is a measure of human demand on the Earth's ecosystems, the amount of natural capital used each year.
A common type of footprint estimates the amount of biologically productive land and sea area necessary to supply the resources a human population consumes, and to assimilate the waste that population produces.n 2007, the Global Footprint Network estimated the global ecological footprint as 1.5 planet Earths; that is, they judged that ecological services were being used 1.5 times as quickly as they were being renewed. Ecological footprint for different nations compared to their Human Development Index.