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 bad news is that the majority of renewable energy is hydropower, which is not an exponentially improving technology. The good news is that solar energy is an exponentially improving technology, growing 30% a year in the US. If this continues, solar installations, which just hit one million in Q1 2015, will account for virtually 100% of US electricity production, according to Stanford's Tony Seba.