As countries prepare to sign the landmark Paris climate accord, the work to reduce global carbon emissions is only beginning, says CFR’s Michael Levi.

While the UN climate summit will not deliver binding commitments to cut carbon emissions, real action on climate policy is occurring on the domestic front, says CFR’s Michael Levi.

The Keystone XL pipeline debate shows the pitfalls of politics intruding on energy policy, says CFR’s Michael Levi. He reviews the pros and cons of the issue and proposes additional steps to bolster …

CFR’s Michael Levi says the disclosure of a clandestine uranium enrichment plant in Iran heightens suspicions the country is seeking a nuclear weapons capability, and raises new pressure for tougher …

The Obama administration’s Nuclear Posture Review charts new positions on potential targets of U.S. atomic weapons, preventing proliferation, and developing new weapons, says CFR’s Michael Levi.