When there is a fault in the electrical systems in the house, it pays greatly to have some background knowledge on using the right tools and what the different colours of the electrical cables mean. Thankfully the electrical semantics at home is not so completed when it comes to changing the bulb or adding electrical appliances to an existing setup. Image source: Flickr.
According to this study and on the contrary, belief, rolling down your windows does save more fuel than rolling up and switching on the air conditioner. Personally, I roll up the windows not to save the fuel but to keep the cabin noise down for me to listen to the music when I am diving. Image source: Business Insider