"If we don't act now on climate change, this coming century may be one of humanity's last," says António Guterres, Secretary-General of the United Nations. As the world recovers from the COVID-19 pandemic, Guterres urges us to use this moment to rebuild with ambitious climate action in mind -- and lays out a blueprint for getting companies, governments and countries to reach net-zero carbon emissions by 2050. "We can only win the race to zero together," he says. "I urge you all to get on board."