Dogs are often called man's best friend. But bees are integral to global food security as well. Bees play a vital role in ecosystems as pollinators of major crops, but their numbers have been falling rapidly due to habitat loss, pollution and pesticides.

World Bee Day: How are bees integral to global food security?

Mexico's at-risk bees have found a new oasis in the southern state of Oaxaca. Threatened by pesticides, intensive agriculture and the effects of climate change, a sanctuary of sunflowers set up by local farmers could be a literal lifesaver for the black and gold insects.

Sunflower sanctuary, hope for bees in southern Mexico

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World Bee Day: How are bees integral to global food security?

Sunflower sanctuary, hope for bees in southern Mexico