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.
The ecological footprint is a measure of human demand on the Earth's ecosystems, the amount of natural capital used each year.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.