Final answer:
Global hectares are measured by considering factors such as environmental and spatial variables, land tenure, and human population.
Step-by-step explanation:
When measuring global hectares, several factors are considered:
- Environmental and spatial variables: This includes habitat extent and habitat loss, which is an important measure of vulnerability. It considers the relationship between the number of species in an area and the size of that area.
- Land tenure: This looks at the coverage of protected areas as an indicator of vulnerability.
- Human population: Some measurements incorporate human population as a factor in assessing global hectares.
These factors help in understanding the impact of human activities and land use on the environment, biodiversity, and sustainability.