A stricter environmental regulations will impose even more restrictions on the already heavy challenges in oil supply.
B more demand for oil will certainly not interfere with the current support for ecological programs to reduce carbon emissions.
C further investments in newly found oil reserves will be the only alternative to help maintain future energy stability in the world.
D shifting to fuel production from tar sands can reduce the oil problems, since tar sands are more abundant and less expensive to drill.
E the exploration of lower grade resources seems to be the best solution to conform to the environmental policies in favor of low carbon emissions.