The Global Warming Potential (GWP) of a greenhouse gas is its ability to trap extra heat in the atmosphere over time relative to carbon dioxide (CO2). This is most often calculated over 100 years, and is known as the 100 year GWP.
Many activities in people's daily lives lead to an increase in greenhouse gases in the atmosphere. Greater public consciousness about the problem has led to people making efforts to avoid or minimise the flow of these gases into the atmosphere.
The greenhouse effect is a warming of the earth's surface and lower atmosphere caused by substances which let the sun's energy through to the ground but impede the passage of energy from the earth back into space.