A landmark climate report released this month by the United Nations predicted dire consequences for the world if more is not done to reduce CO2 levels in the atmosphere. More than 100 countries including the U.S. have committed to a goal to become carbon neutral by the year 2050. One of the biggest challenges to meeting that goal is making homes energy neutral. Special Correspondent Willem Marx reports as part of our series Peril & Promise: The Challenge of Climate Change.
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