A gram stain is a type of microbiology or laboratory test that determines whether bacteria are present. It also determines whether bacteria are gram negative or gram positive. The difference between gram negative and gram positive bacteria can be important when determining appropriate treatment for an infection.
Globally, the available ecologically productive land area included in the Ecological. footprint analysis is 1.89 hectares for each person. The footprint takes into account fossil. fuel use, cropland, forests, nuclear and hydroelectric power, fisheries and buildings.
Only about 3% of the Chinese water footprint falls outside China. Japan with a footprint of 1100 cubic meter per year per capita, has about 60% of its total water footprint outside the borders of the country. The USA water footprint is 2600 cubic meter per year per capita. Source: UNESCO-IHE - Water Footprint