The following definitions reflect those used by the International Energy Agency (IEA); definitions used by other organisations and publications may vary.
distributed energy resources, such as solar photovoltaic (PV) or wind power
development finance institution
district heating and cooling
Department of Energy (United States)
Department of the Interior (United States)
Department of Transportation (United States)
direct reduced iron
generally used as an instrument to hedge risk, but can also be used for speculative purposes.
direct equity investment
the acquisition of equity (or shares) in a company.
a vehicle that has two fuel systems and can switch from one fuel to the other, such as gasoline/compressed natural gas (CNG).
emission objectives that are adjusted according to a pre-agreed metric such as GDP for a country or production level for an industry.
101 deca (da) - 10-1 deci (d)
102 hecto (h) - 10-2 centi (c)
103 kilo (k) - 10-3 milli (m)
106 mega (M) - 10-6 micro (µ)
109 giga (G) - 10-9 nano (n)
1012 tera (T) - 10-12 pico (p)
1015 peta (P) - 10-15 femto (f)
1018 exa (E) - 10-18 atto (a)