Speaking Eco Green

A solar thermal collector is essentially a directed magnifying glass pointed at a specific liquid container.  Water, oil, and anti-freeze have traditionally been used to store this solar energy for household use.  They are great for storing solar energy because they each have a high boiling point, making long term energy storage possible.
 
There are many uses for this stored energy, such as heating an entire house, proving hot water, and heat for cooking.  With a solar thermal collector, you add green energy to your daily consumption and lower your impact on the earth.