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.
Naturalism is the belief that nothing exists beyond the natural world. Instead of using supernatural or spiritual explanations, naturalism focuses on explanations that come from the laws of nature. Beyond the belief that everything can be explained using nature, naturalism is also a term for a particular style of art and literature from the 19th century. Naturalism refers to a realistic approach to art that rejects idealized experiences.