What is the tendency of the seasonal weather in North Korea, South Korea, and Japan​?

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.

Read the article about the fraser river, one of the most important rivers in canada. what is the most important species of fish in this river? why are the numbers of these fish declining?

The desert expands by hundreds of square miles each year.