Q68586 - CESGRANRIO - 2010 - Petrobrás - Administrador - Biocombustível,

The author reports that world oil reserves are at a 'tipping point' because oil

a) is already being replaced by alternative fuels in most uses of the fuel.
b) is now in shortage and will not supply global needs in the near future.
c) has already been substituted by alternative energy fuel resources worldwide
d) has been misreported as non-abundant to satisfy political interests of non-producing nations.
e) has reached a peak in off-shore wells and is now abundantly extracted from tar sand reserves.

Inglês