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The search for the source of plastic pollution

Grist

Unlike several other Earth Day weekend cleanups going on farther down the beach, this group has been given special instructions that will help them categorize and log everything they find, from food scraps and toys to tiny pieces of foil and, of course, many types of plastic.

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Does planting trees actually help the climate? Here’s what we know.

Grist

Want to do something good for the Earth? This common belief, once an inspiration for Earth Day T-shirts, now forms the basis of a booming global industry. In cities, trees provide much-needed shade on hot summer days, remove pollution from the air, and help manage stormwater, reducing runoff and improving its quality.