Electric vehicles EVs have many environmental advantages. Firstly. they greatly improve air quality in cities by reducing emissions. Unlike traditional cars. pure electric vehicles do not emit any harmful pollutants while in use. In addition. EVs are highly efficient as electric motors can convert 75% of the energy stored in batteries into power for the wheels. This is much higher than the 20% conversion rate of internal combustion engines using gasoline.

Aircraft or plane engines can vary depending on the type of the aircraft. Large commercial jets usually use turbofan engines. These are large usually cylindrical in shape and housed under the wings or at the rear of the aircraft. They have a large spinning fan at the front, followed by a core which includes the compressor, combustion system, and turbine, often visible when looking straight into the fan.

On the other hand, smaller aircraft or private planes might use piston engines that look more rectangular box with protruding cylinders, very similar to a car engine. It's often located at the front of the aircraft with a propeller attached to it.

Jet engines, used in military and some commercial aircraft, are sleek and narrow, often integrated into the body or wings of the aircraft for aerodynamic efficiency.

Keep in mind that engine housing and external components are often painted the same color as the aircraft, but internal components usually remain a metallic color due their material (typically various types of high-strength metal alloys).

Titanium dioxide powder can be purchased from various sources depending on the intended use. For industrial or commercial quantities, specialized chemical suppliers like Sigma-Aldrich or Fisher Scientific are reliable options. For smaller quantities or for uses like cosmetics or crafts, platforms like Amazon or eBay offer a wide range of options. Some art supply stores may also carry titanium dioxide powder for its use in pigments. Always ensure the grade of titanium dioxide matches your application (e.g., food grade for culinary purposes, cosmetic grade for skincare products) and consider the reputation of the seller before making a purchase.