Arctic sea ice loaded with microplastics

At first glance, it looks like hard candy laced with flecks of fake fruit, or a third grader's art project confected from recycled debris.

The Amazon is on fire: Here are 5 things you need to know

Record fires are raging in Brazil's Amazon rainforest, with more than 2,500 fires currently burning. They are collectively emitting huge amounts of carbon, with smoke plumes visible thousands of kilometers away.

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