Frontotemporal dementia (FTD) or frontotemporal degenerations refers to a group of disorders caused by progressive nerve cell loss in the brain's frontal lobes (the areas behind your forehead) or its temporal lobes (the regions behind your ears).
Solar thermal (heat) energy is a carbon-free, renewable alternative to the power we generate with fossil fuels like coal and gas. This isn't a thing of the future, either.
The energy from the sun is produced by nuclear fusion in the suns core and travels at the speed of light to earth (186,000 miles/ second). Solar energy is a renewable source since there will be solar energy as long as the sun exists.