Carbon offsets are tools are tools that permit you to invest in small incremental ways in significant projects designed to reduce greenhouse gas emissions. The projects range from global to local. 

Although there are six primary categories of greenhouse gases,[1] carbon offsets are measured in metric tons of carbon dioxide-equivalent (CO2e). 
One carbon offset represents the reduction of one metric ton of carbon dioxide, or its equivalent in other greenhouse gases.  
Carbon offsets are popular with travellers, on behalf of one thing.  You may not be able to cut back on the air travel you do but think about buying a carbon offset with every plane ticket you purchase!
Below are a few of our favorite sources of carbon offsets, favorite because of the fact that we like their choices of projects as well as think they offer the best return on behalf of your investment:
·         www.terrapass.com.  Buy a TerraPass as well as your money funds clean energy as well as efficiency projects such as wind farms. These projects result in verified reductions in greenhouse gas emissions.  Charges about $10./ per ton
·      www.carbonfund.org – Average fees at $5.50 US per metric ton of carbon dioxide.  Works with dairy farms in California. Manure from 14 farms is collected daily as well as processed in a closed environment that captures greenhouse gases.
·      www.e-BlueHorizons.net - projects capture heat-trapping gases from landfills in New England.