Spiking temperatures in the Arctic are rapidly melting glaciers. Scientists are now worried about underground methane, a potent greenhouse gas, leaking up to the surface.
I came to type potentially with a question mark and you beat me to it. I would go with definately and already has. Permafrost started melting in the early 20teens.
I came to type potentially with a question mark and you beat me to it. I would go with definately and already has. Permafrost started melting in the early 20teens.