July 18, 2008
Posted: 10:17 AM ET
Pope Benedict XVI admires the sky aboard a harbor cruise with youths, in Sydney, Australia, Thursday, July 17, 2008. (AP Photo/Gregorio Borgia)
Pope Benedict XVI continues to speak out against global warming.
200,000 pilgrims from 168 countries are in Sydney for the Church's World Youth Day.
The following is an excerpt from the the 81-year-old pontiff's speech yesterday:
"Perhaps reluctantly we come to acknowledge that there are also scars which mark the surface of our Earth: erosion, deforestation, the squandering of the world's mineral and ocean resources in order to fuel an insatiable consumption."
He went on to say that care for the environment is of "vital importance for humanity".
Is this unprecedented? Have other popes addressed global warming?
The Roman Catholic Church has over a billion followers worldwide. Will this sort of public awareness campaign make a difference?
- Alex Walker, CNN Science & Technology
July 15, 2008
Posted: 05:36 PM ET
Thomas Edison with his electric car in 1913.
They produce zero emissions.
Electricity is cheaper than gas, and can come from renewable resources such as wind and solar power.
EV engines are far more efficient than internal combustion engines, are more reliable, and require less maintenance.
So what gives? Why don’t we buy and drive electric cars?
Program Note: Watch Miles O'Brien's report on EV's on CNN TV, Thursday morning.
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