If you are an American, your climate and environmental actions [or non-actions] will decide the fate of about 1 square kilometer* of land and sea around the world every year.
If you are an American, the survival and health of the people, creatures and plants on that 1 square kilometer is largely determined by the climate and environmental actions that you take [or don't take] every day.
So when you take actions that help save our dying planet, acknowledge yourself for making things better for the habitat and the precious lifeforms [including people] that are scattered all over this planet Earth that you are responsible for.
After all, if the people, creatures and plants in your square kilometer knew who you are, they would certainly want to thank you for the climate and environmental actions that you take so they can survive and thrive.
Even though it is not possible to see your whole square kilometer in one place, your environmental actions matter immensely to the species and people [including that part of yourself] that lives on that square kilometer.
Dividing your income by $43,000 will give you a more accurate estimate of the square kilometers you are responsible for. See the formula below.
Whatever country you live, you can estimate the square kilometers you are responsible for by converting your net income to US dollars. See the formula below.
My Net Income / $43,000 = My Square Kilometer
To calculate a more accurate estimate of your square kilometer area of responsibility, divide your yearly net income before taxes in US dollars by $43,000.
If you make less than $43,000 US dollars it will be a fraction of kilometer.
One square kilometer is the approximate area of responsibility for an American with a net income of $43,000.
If you live in another country, you can estimate the square kilometers you are responsible for by converting your net income to US dollars, and then dividing by $43,000.
The basis for the My Square Kilometer formula
The area of land and sea impacted by a person correlates to how much money they make. That's because, in general, the more money a person makes the more of planet Earth's area is used and affected by that person.
There are about 14.7 per people per square kilometer in the world including land and water areas.
The average income per person around the world is about $2,920 US dollars equivalent per person.
Therefore, because 14.7 X 2,920 is 42,924, the average total net income per square kilometer around the world for the people who live on or use that kilometer is about $43,000 US dollars.
And so, someone with a net income of a $43,000 US would be responsible for the environmental impacts happening to an area of the typical square kilometer.
If someone makes more than $43,000 US, they need to divide their US dollar equivalent yearly income before taxes by $43,000 US to see how many square kilometers they are responsible for.
If someone makes less more than $43,000 US, it will be a fraction of kilometer.
The world's population is around 7,500,000,000 and Earth's total area (including land and water) is 510,000,000 square kilometers (197,000,000 sq. mi.). Therefore, the worldwide human population density is around 7,500,000,000 ÷ 510,000,000 = 14.7 per km2 (38 per sq. mi).
Purchasing power parity
A much higher percentage of the goods and services sold in a developed country with a higher PPP have a much greater negative impact on the environment and our planet's climate. Therefore, the My Square Kilometer is not adjusted for purchasing power parity (PPP). ~Stele
Long version of the My Square Kilometer formula
My Net Income (in US dollars before taxes) / $43,000 (US dollars) = My Square Kilometers (of habitat around the world that I am responsible for)
A kilometer is .62 of a mile. Therefore, 1 square kilometer equals .62 squared to get the square miles equivalent.