The four types of economic assumptions that can negatively affect the environment are: 1. N<span>atural resources and human resources are infinite 2. It g</span><span>rants an event in the future less value than one in the present; short-term costs and benefits are granted more importance than longterm costs and benefits. 3. A</span>ll costs and benefits associated with an exchange of goods or services are borne by individuals engaging directly in the transaction (<span>buyer and seller alone). </span>4. E<span>conomic growth is required to keep employment high and maintain social order.</span>