The train derailment in Ohio last month led to a controlled release and burn of vinyl chloride, which can produce dioxin. Locals are concerned that the soot that fell on their homes in the wake of the disaster may contain this potent neurotoxin.

Also, carbon capture and storage involves a network of pipelines that transport carbon dioxide from source to sink so that it can’t warm the planet. But these pipelines carry high-pressure CO2 that can be dangerous, even lethal. 

And showy traits like dark pigmentation on a dragonfly’s wings or a lion’s big, dark mane play a key role in how some animals choose a mate. New research suggests that climate change is making some classically attractive traits more difficult to pull off. 

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