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.
Renewable energy is energy produced from a source that is not permanently depleted. Sunlight, wind, flowing water, geothermal heat, and plants are examples of renewable energy resources. They can be produced today without damaging their ability to be produced in the future.