  If we separate energy in a holographic theory into an extensive part and an
intrinsic part, where the extensive part is given by the cosmological constant,
and assume entropy be given by the Gibbon-Hawking formula, the Cardy-Verlinde
formula then implies an intrinsic part which agrees with a term recently
proposed by Hsu and Zee. Moreover, the cosmological constant so derived is in
the form of the holographic dark energy, and the coefficient is just the one
proposed recently by Li. If we replace the entropy by the so-called Hubble
bound, we show that the Cardy-Verlinde formula is the same as the Friedmann
equation in which the intrinsic energy is always dark energy. We work in an
arbitrary dimension.
