Buying coffee grown by certified farms, such as this one in Guatemala, guarantees environmental, social and economic sustainability. (Video: Assignment Earth)

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"Assignment Earth" features compelling video reports from the front lines of major environmental stories from around the globe. Topics include global warming, pollution, habitat destruction and endangered species.

Related Links:

Rainforest Alliance: Sustainable Coffee

Top 5 Indicators of Sustainable Coffee

More videos in the Assignment Earth Guatemala series:

Smart timber
Flower power
Ecoventure