An economic surplus is also known as total welfare. An economic surplus is related to money, and it reflects a gain in the expected income from a product. There are two types of economic surplus: consumer surplus and producer surplus.
A bit academic in terms of style, but accessible, nonetheless! Environmentalism refers to a social movement and associated body of thought that expresses concern for the state of the natural environment and seeks to limit the impact of human activities on the environment.
From Wikipedia, the free encyclopedia. Federalism is a political philosophy in which a group of people are bound together, with a governing head. In federalism, the authority is divided between the head (for example the central government of a country) and the political units governed by it (for example the states or provinces of the country).