If the world's population continues to grow exponentially it's going to happen anyway with or without expensive carbon sequestration and silly offset schemes that never work.
Rather than store carbon in solid form, which in fact plants (rainforest and such) already do anyway without the unecessary expense, why not close coal fired power stations and build nuclear? They're safer and the waste is negligible compared to coal and can be further reduced (breeder reactors, thorium cycle etc.). Burning coal also throws heavy metals (Mercury and Arsenic to name a few) and SO2/SO3 into the air. Carbon dioxide is the least of coal's problems because it can be fixed by plants or turn into bricks with additional expense.
Rather than store carbon in solid form, which in fact plants (rainforest and such) already do anyway without the unecessary expense, why not close coal fired power stations and build nuclear? They're safer and the waste is negligible compared to coal and can be further reduced (breeder reactors, thorium cycle etc.). Burning coal also throws heavy metals (Mercury and Arsenic to name a few) and SO2/SO3 into the air. Carbon dioxide is the least of coal's problems because it can be fixed by plants or turn into bricks with additional expense.