"The "tipping point" will arrive when the capital cost of solar power falls below $1 (51p) per watt, roughly the cost of carbon power. We are not there yet. The best options today vary from $3 to $4 per watt — down from $100 in the late 1970s.
Mr Sethi believes his product will cut the cost to 80 cents per watt within five years, and 50 cents in a decade."
Any chance this will save the world?"