The decision to reverse the order is not surprising, but the addition of South Africa to the restricted travel list highlights the new administration's concern about mutations in the virus.

Methane emissions caused by human-related activities, especially from livestock, and oil and gas industries, are responsible for 25% of global warming, according to the United Nations. Hari Sreenivasan reports on the growing call by environmentalists and the oil and gas industry to measure and curb methane emissions. The report is part of our ongoing series on climate change, "Peril and Promise."

In his first hours in office, President Biden signed executive orders aimed at tackling the climate crisis and rolling back Trump-era policies, some of which denied the science of human-caused climate change. NewsHour Weekend's Ivette Feliciano spoke with May Boeve, executive director of climate justice organization 350.org, about the potential impact of Biden's new climate commitments.