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.
In the question What is true for solar, wind, and geothermal energy?. The correct answer is that they are all renewable energy. Solar energy is energy that comes from the heat from the sun. Wind energy is the energy that is generated from the wind. Geothermal energy energy is the energy that comes from the heat from the earth.