Researchers have developed a program that measures how many planet earths are needed to provide the resources humanity is using. this ecological yardstick is called ecological footprint
The Global Footprint Network promotes the ecological footprint as a way to assess how much nature is needed to sustain a given number of people or an economy. Through an ecological accounting system, it monitors this demand. The accounts compare the biologically productive areas used by people for consumption to the biologically productive areas available in a region or around the world (biocapacity, the productive area that can regenerate what people demand from nature).
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In any particular culture, an idea or way of doing things that is common to the culture is called a cultural norm.
The temperature decreases in the mesosphere since there is no ozone and the amount of air is decreasing.
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Well I am wrong the answer is A for that helps keep the environment clean
It shows what certain symbols or pictures could mean on a map, and in addition, could show a scale that converts inches or centimeters that you can measure with a ruler to miles.
