A La Nina cooling weather phenomenon that kicked in last month appears to have done little to dent soaring global and ocean temperatures. But what is this climate event? And can it really dampen the effects of an otherwise warming planet?

Why has La Nina not ushered in cooler temperatures? Climate change is playing a role

A La Nina cooling weather phenomenon that kicked in last month appears to have done little to dent soaring global and ocean temperatures. But what is this climate event? And can it really dampen the effects of an otherwise warming planet?