A hypothetical future economy in which the primary form of stored energy for mobile applications and load balancing is hydrogen (H₂), and, in particular, hydrogen replaces fossil fuels in automobiles.

(economics) The buying and selling of products from an economical viewpoint, dealing with the manufacture, distribution, and usage of the product.

(manner) In an economical manner; not wastefully; not extravagantly / (domain) From the perspective of economics or an economy. / (theology) According to divine economy.

Careful with money so as not to spend too much; prudent; thrifty. / Saving money or resources. / (dated) Relating to economy in any other sense.

a movement among Protestant groups since the 1800s aimed at achieving universal Christian unity through international or interdenominational organizations. There are also Ecumenical Councils in the Roman Catholic church; since the Great Schism (1054), the Eastern churches have not been involved.

The quality of being eccentric or odd; any eccentric behaviour.

(biblical) A book in the Old Testament of the Bible.

the study of the effects of chemical compounds on the interactions of living organisms

A post-carbon economy, based on lithium fuel cells for the generation of power.

A proposed alternative to capitalism that uses participatory decision making.