Saving the environment can start with cleaner water-heating devices. Many different water heating systems exist, including tankless solar powered systems. These devices may be installed in any sunny location, even on your roof.
Install and review of Bunker Hill 60 LED Solar Security Light bought at Harbor Freight. Item 69643.
Carefully consider the types of solar panels you plan on having installed. Long ago, if you didn't have enough roof space, you'd need very expensive high efficiency mono-crystalline panels. There are now more advanced polycrystalline panels and even thin film panels. If you've got enough roof space, you might wish to look at the size of the panels in relation to their output capacity to avoid having insufficient panels that you need more of later.