Greenhouse Gases in Earth's Atmosphere
A greenhouse gas (or GHG) is any gas in the atmosphere that absorbs and releases heat, thereby causing the planet's atmosphere to be warmer than it would otherwise be. The main greenhouse gases in the Earth's atmosphere are water vapour, carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), ozone.
Greenhouse gases occur naturally in the Earth's atmosphere, but human activities, such as burning fossil fuels, increase greenhouse gas levels in the atmosphere and cause global warming and climate change. The Kyoto Protocol is an international treaty to control the release of greenhouse gases due to human activities.
It is important to note that different greenhouse gases persist in the atmosphere for different periods of time and absorb different amounts of heat. The "Global Warming Potential" (GWP) of a greenhouse gas indicates how much heat a gas causes over a given period of time (usually 100 years). GWP estimates, starting with CO2 as index 1, the greenhouse gas potential of the other gases produced by combustion. For example, 1 kg of methane causes 25 times more warming over a 100-year period than 1 kg of CO2. Thus, methane has a GWP value of 25.
Climate Impacts of the Different Means of Transport
With CarbonCare's CO2 calculator, not only can you calculate the greenhouse gas emissions of a wide variety of transportation modes, but you can also compare them, allowing you to make smart decisions when it comes to sustainability. (Trucks, trains, aircraft, ocean-going and inland waterway vessels).CO2-Rechner >
Dramatic increase in average temperatures.Global Warming >