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Mural by Diego Rivera showing life in Aztec times in the city of Tenochtitlán. Wikimedia Commons

When the Aztecs founded Tenochtitlán in 1325, they built it on a large island on Lake Texcoco. Its eventual 200,000-plus inhabitants relied on canals, levees, dikes, floating gardens, aqueducts and bridges for defense, transportation, flood control, drinking water and food. After the Spaniards conquered the city in 1521, they drained the lake and built Mexico City over it.

The now-sprawling metropolis, with 100 times the number of inhabitants as Tenochtitlán at its peak, is fascinating, with lively culture, complex history and diverse architecture. It's also a mess. Water shortages, water contamination and wastewater issues add to the complications of crime, poverty and pollution. Drained and drying aquifers are causing the city to sink—almost 10 meters over the past century!

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EcoWatch Daily Newsletter

Xsandra / Getty Images

Looking for ways to cut down on single-use plastic while grocery shopping? You may already have eco-friendly shopping bags, but bringing your own reusable produce bags is another easy swap.

According to the UN Environment Program, up to 5 trillion single-use plastic bags are used globally each year, and because of the material they're made from, most municipal recycling centers don't accept them (more on this below).

The most sustainable option is to skip the bag altogether. You can also make your own reusable produce bags out of old T-shirts. But if you'd rather purchase them new, here are our recommendations for the best reusable produce bags on the market today.

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