Americans try to shift into 'carbon neutral'

Gregory Lamb in his article talks about being carbon neutral, carbon-positive and negative, carbon footprint.

"...Some environmentalists worry that the idea of going "carbon neutral" could be detrimental if it leads to people only buying offsets and not changing their lifestyles..."

"...Kenyan environmentalist Wangari Maathai, who won a 2004 Nobel Peace Prize, recently urged what might be the grandest plan yet to offset carbon emissions at last month's international meeting on climate change in Nairobi, Kenya. Ms. Maathai proposed that the world's citizens commit to planting 1 billion trees, which would absorb about 250 million tons of the carbon dioxide now warming the atmosphere..."