There are a few kind of environmentally friendly car engines. The first would be an electric engine, because it uses no fuel and is simply charged. Another is a hybrid engine, which uses fuel as well as electric or hydrogen. There are also compressed air engines (which are more environmentally friendly than electric) and solar energy engines.
they are 4 stroke engines...
Answer Nothing more than any other type of airplane or car. Most helicopters are powered by jet engines that use a gearbox to power the rotor blades. The turbine jet engines are relatively evironmentally friendly compared to other internal combustion engines.
Most engines are internal combustion 4 stroke (4 cycle) engines.
solar power
The most eco - friendly train is the one that do not contribute pollution to the environment. A train runs by electricity is one.
The most eco-friendly features of a freezer that make it a sustainable choice for the environment are energy efficiency, use of environmentally friendly refrigerants, and proper insulation to reduce energy consumption.
challenging, friendly environment, growing opportunities
solar energy and win energy are the most environment friendly because the are renewable source of energy.moreover they are present in abundance.whereas water is also a renewable source but it is more difficult to renew it.hence solar and wind energy are the best option.
Turbine engines are most commonly found in airplanes. They use gas for fuel. They are also known as "jet" engines, hence the term for the plane.
Most of the newer washers and dryers are considered eco-friendly. You can choose to spend the extra money on something that is more eco-friendly, but you will be helping the environment with the cheaper versions as well.
Some of the most used search engines are: Google, Yahoo, Bing, Ask, Answers, and the new one Dogpile. Dogpile, wich came out at about the year of 2011. It allows kid friendly searches on the internet for almost nearly every computer.
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