The social cost helps regulators factor in harm from climate change when they consider new rules and purchases, like buying electric- vs. gas-powered trucks for the Postal Service.
From healthcare, to the environment, immigration and racial justice, which areas of Barack Obama’s legacy were the most vulnerable – and most resilient – during Donald Trump’s first term?
Three years after his farewell address, Obama is embracing party politics again.
Cheriss May/NurPhoto via Getty Images
In his endorsement of Biden, Obama gave his consent for his former running mate to go beyond the policy platform they built. It also freed Obama to use his rhetorical powers in the upcoming election.
A United Nations staff member pays tribute to Kofi Annan during a ceremony at the European headquarters of the UN in Geneva, Switzerland.
EPA-EFE/ Salvatore Di Nolfi
As the Trump era begins, Australian are having an overdue debate about the need for greater self-reliance at a time when American power may be receding.
Obama has prioritized development of wind and solar in a number of ways, including installation on military bases.
AP Photo/Carolyn Kaster
The Trump administration has the tools to slow the momentum Obama started on clean energy. Countering Trump are global market forces and state-level action.
What’s left when Obama walks off into the sunset?
Jason Reed/Reuters
The nation needed a full-throated rebuttal to the nativism, racism and misogyny that characterized the president-elect’s campaign. Obama failed to deliver.
Innovation is a huge part of economic growth – and the White House needs to be well-informed on science and tech issues when setting goals and budgets. Here’s how presidents get up to speed.
Obama annually welcomed students to the White House with their Science Fair projects.
AP Photo/Susan Walsh
The outgoing president leaves behind some solid accomplishments in the world of science, tech and medicine. But the biggest departure from his predecessors might have been in his approach.
With a $1 trillion modernisation programme signed off and atomic scientists deeply worried about the future, American policy on nuclear weapons is pretty much business as usual.
Professor of Energy and Environmental Policy and Director, Center for International Environment and Resource Policy at The Fletcher School, Tufts University