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.
Sample Student Essays: Ecological Footprints.  1 There are no passengers on spaceship, we are all crew. Our ecological footprint represents how much land is required to support us. We live in a society where we consume majority of the Earths consumables but barely represent 20% of the population.