How did geography effect the culture of north and south america.

Surplus discretionary travel direct money is what's available after paying for the necessities of life

You are a scientist who has been sent on a special mission to study plants and animals in south asia! your destination is an important forest in eastern india. you need to travel to 17°n latitude and 83°e longitude. which star should you travel to?

People keep spending additional units of a particular resource on a want until their marginal benefit is  decreasing withgreater thanless thannot affected by  their marginal cost.