Human emissions of greenhouse gases – carbon dioxide (CO 2), nitrous oxide, methane, and others – have increased global temperatures by around 1℃ since pre-industrial times. Forcing greenhouse gases take many years to leave the atmosphere. Figure 1: Source: Forcing greenhouse gases - Global emissions (2012), International Energy Agency. 1. Human activities are responsible for almost all of the increase in greenhouse gases in the atmosphere over the last 150 years. In other words, greenhouse gases are the type of gases that first absorbs infrared radiation and then actually emits thermal radiation back. Human activities are responsible for almost all of the increase in greenhouse gases in the atmosphere over the last 150 years.

The table below shows the relative concentrations of these major greenhouse gases and their sources.

Greenhouse gases cause the greenhouse effect on planets.

Greenhouse Gases: Methane, Carbon Dioxide Share of Global GHG Emissions: 3%. The primary greenhouse gases in Earth's atmosphere are water vapor (H 2 O), carbon dioxide (CO 2), methane (CH 4), nitrous oxide (N 2 O), and ozone (O 3).Without greenhouse gases, the average temperature of … CO 2, CH 4, N 2 O and the fluorinated gases are all well-mixed gases in the atmosphere.4 They do not react to changes in either temperature or air pressure and thus do not get removed easily like water that condenses to become … I invite you to the discussion.

Scientists attribute the global warming trend observed since the mid-20 th century to the human expansion of the "greenhouse effect" 1 — warming that results when the atmosphere traps heat radiating from Earth toward space.. Certain gases in the atmosphere block heat from escaping. (November 2009) ( Learn how and when to remove this template message) This is a list of LLGHG (long-lived greenhouse gases) greenhouse gases as used by the IPCC TAR. In many countries, greenhouse gas emissions continue to grow.

A greenhouse gas (sometimes abbreviated GHG) is a gas that absorbs and emits radiant energy within the thermal infrared range.

Unfortunately, the problem of sources of greenhouse gas on Earth continues to grow.
5 major greenhouse gases and their sources. Please improve this by adding secondary or tertiary sources.

1. The term ‘greenhouse gases’ (GHG) refers to a type of gas (and there are a few different gases that this can refer to) that is capable to hold or trap heat in the atmosphere. 1 The largest source of greenhouse gas emissions from human activities in the United States is from burning fossil fuels for electricity, heat, and transportation. Consequently, measured atmospheric concentrations of carbon dioxide are many times higher than pre-industrial levels. Greenhouse gas, any gas that has the property of absorbing infrared radiation (net heat energy) emitted from Earth’s surface and reradiating it back to Earth’s surface, thus contributing to the greenhouse effect.

Carbon dioxide.

Greenhouse gases reflect radiation that the Earth emits, and stop it from being lost into space.
This causes the Earth's temperature to be higher than it would be without greenhouse gases.The name for this is the "greenhouse effect. This article relies too much on references to primary sources. It is a very harmful and damaging greenhouse gas. The atmospheric concentrations of some greenhouse gases are being affected directly by human activities namely carbon dioxide (CO 2 ), methane (CH 4 ), nitrous oxide (N 2 O), ozone (O 3 ), and synthetic gases, such as chlorofluorocarbons (CFCs) and hydrofluorocarbons (HFCs). Greenhouse gases trap heat and make the planet warmer. Carbon dioxide has the chemical formula CO2. .

1 The largest source of greenhouse gas emissions from human activities in the United States is from burning fossil fuels for electricity, heat, and transportation.