Warm weather isn’t good news when it's in the Far North.
This doesn't look good.
The worst thinning is above middle latitudes, where most people on Earth live.
One thing we do know is that we need to keep watch over both the environment and agreements like the Paris deal.
Trees are often cut down to make way for the products demanded by the world's biggest companies.
They also "sweat" to cool their leaves.
A cleaner atmosphere might lead to a warmer planet.
A new study offers fresh insights.
According to NASA, last year was the warmest on record without an El Niño boost.
This could devastate already delicate ecosystems.
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