But the point I was trying to make is that the new fact in the world is the remarkably rapid fall in the price of renewable energy. (dotearth.blogs.nytimes.com)
The reason for this is the extremely rapid fall - off of mass density with height above the solar surface. (scientificamerican.com)
The cause of the cancellations was the continuing rapid fall in the cost of solar power. (ramblingsdc.net)