When you purchase
green power, you have two choices -- Renewable Energy Certificates (RECs) or
Green Supply. For an explanation of RECs and
Supply, click here.
Because Renewable Energy Certificates displace
dirty power, they can offset the climate impact of any activity you choose,
including driving and flying. To offset all your carbon emissions,
select a provider from the REC list below, and visit its
"carbon calculator." To change your home electricity account, choose
from the Green Supply list below.