Declining bee populations have been widely covered in the news. It is a pressing issue worldwide as one in three bites of food that we eat relies on bee pollination.
A key factor that affects bees is increasing urban development as people flock to cities. As cities develop, they sprawl into their surroundings, fragmenting animal habitats and replacing vegetation with hard surfaces such as concrete and asphalt. Insects, including a multitude of native bees, rely on soil and plants for foraging and nesting.
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https://theconversation.com/bees-in-the-city-designing-green-roofs-for-pollinators-84688