Green Chemistry and Green House
The natural greenhouse effect is caused by greenhouse gases which occur naturally in the earth’s atmosphere. The main natural greenhouse gases are carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and water (H2O). These gases absorb and re-radiate the sun’s heat, helping to warm the planet and providing a temperature range that is suitable for life as we know it. Without these natural greenhouse gases, the temperature of the earth’s atmosphere would be approximately 34 degrees Celsius lower than it is today.