Climate change is defined as an alteration in global or regional climate patterns. In particular, the term refers to a change, apparent from the mid to late 20th century onward, that is attributed largely to the increased levels of atmospheric carbon dioxide produced by the use of fossil fuels.
The most accurate definition of the open data says that open data presents data that can be freely used, re-used and redistributed by anyone - subject only, at most, to the requirement to attribute and share alike. The main characteristics of open data are: availability and access, reuse and redistribution, and universal participation.
Social entrepreneurship is the attempt to draw upon business techniques and private sector approaches to find solutions to social, cultural, or environmental problems. While conventional entrepreneurs typically measure performance in profit, revenues, and increases in stock prices, social entrepreneurs also take into account a positive "return to society".