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.
Earthday.net, with its theme of 'Protecting our home' , offers a number of resources to understand and study the concept of ecological footprint. Together with Redefining Progress, it measures how much is needed to produce the resources we consume and dispose of our waste.