Much more nuclear power (Generation III and IV, high temperature breeder reactors, thorium breeder reactors, etc).

Use methane, methanol, DME, synthetic diesel and kereosene (jet fuel) made of cellulose and waste instead of gasoline.

Light and effiecent cars with hybrid and/or diesel engines.

Stop using electricity, oil and natural gas for central heating.

Wave, tidal and wind power.

Forbid SVU's and pick ups for those who don't need it for work.

Lower prices on commuting, more railroads and fast trains like the Japanese Shinkansen.

Replace today's aircrafts with Zeppelins and new planes with turboprops, built with new, lighter alloys and composite materials.

Etc. (Most of this could have been done during the 1970's, so don't give me bullcrap about "new technologies that won't exist until year 2050".)

"Batman is only meaningful as an answer to a world which in its basics is chaotic and in the hands of the wrong people, where no justice can be found. I think it's very suitable to our perception of the world's condition today... Batman embodies the will to resist evil" -Frank Miller

"Conan, what's the meaning of life?"
"To crush your enemies, see them driven before you, and hear the lamentations of their women!"
-Conan the Barbarian

"Well, yeah."
-Jason E. Perkins

"If I had a dime for every time Pariah was right about something I'd owe twenty cents."
-Ultimate Jaburg53

"Fair enough. I defer to your expertise."
-Prometheus

Rack MisterJLA!