Whois & Analysis for fueleconomy.gov

A greenhouse gas (abbrev.

GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range.

This process is the fundamental cause of the greenhouse effect.

The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.

Without greenhouse gases, the average temperature of Earth's surface would be about, rather than the present average of.

In the Solar System, the atmospheres of Venus, Mars and Titan also contain gases that cause a greenhouse effect.

Air pollution occurs when harmful substances including particulates and biological molecules are introduced into Earth's atmosphere.

It may cause diseases, allergies or death in humans; it may also cause harm to other living organisms such as animals and food crops, and may damage the natural or built environment.

Human activity and natural processes can both generate air pollution.

The fuel economy of an automobile is the fuel efficiency relationship between the distance traveled and the amount of fuel consumed by the vehicle.

Consumption can be expressed in terms of volume of fuel to travel a distance, or the distance travelled per unit volume of fuel consumed.

Since fuel consumption of vehicles is a significant factor in air pollution, and since importation of motor fuel can be a large part of a nation's foreign trade, many countries impose requirements for fuel economy.

Different measurement cycles are used to approximate the actual performance of the vehicle.

The energy in fuel is required to overcome various losses (wind resistance, tire drag, and others) in propelling the vehicle, and in providing power to vehicle systems such as ignition or air conditioning.

Various measures can be taken to reduce losses at each of the conversions between chemical energy in fuel and kinetic energy of the vehicle.

Driver behavior can affect fuel economy; maneuvers such as sudden acceleration and heavy braking waste energy.

The United States Environmental Protection Agency (EPA or sometimes USEPA) is an agency of the Federal government of the United States which was created for the purpose of protecting human health and the environment by writing and enforcing regulations based on laws passed by Congress.

The EPA was proposed by President Richard Nixon and began operation on December 2, 1970, after Nixon signed an executive order.

The order establishing the EPA was ratified by committee hearings in the House and Senate.

The agency is led by its Administrator, who is appointed by the president and approved by Congress.

The current administrator is Scott Pruitt.

The EPA is not a Cabinet department, but the administrator is normally given cabinet rank.

Fuel efficiency is a form of thermal efficiency, meaning the efficiency of a process that converts chemical potential energy contained in a carrier fuel into kinetic energy or work.

Overall fuel efficiency may vary per device, which in turn may vary per application fuel efficiency, especially fossil fuel power plants or industries dealing with combustion, such as ammonia production during the Haber process.