Rose

Millions of roses get handed out on Valentine's Day. But growing roses has an environmental impact worse than many other crops. Start with climate change: most roses in the U.S. and Europe are imported from warmer climes. All that flying and trucking adds thousands of metric tons of carbon dioxide to the atmosphere. Then there's all the water needed to, well, water the flowers. And the runoff fouled by copious quantities of pesticides needed to make the roses look perfect. There's also the wildlife and workers poisoned by all that fumigation . Add to that habitat destruction where floral plantations displace native forest and wetlands.