Watch on YouTube Got questions about climate change? Ask the President's science advisor. Dr. John P. Holdren, Director of the White House Office of Science and Technology Policy, wants to answer any questions that you have about climate change — what it means, how bad it actually is, and what we can do to fight it. Starting today, ask Dr. Holdren your questions on Facebook, Twitter, Instagram, or Vine using the hashtag #AskDrH — and he'll answer some of them on camera. read more

#AskDrH: The President’s Science Advisor Is Answering Your Questions on Climate Change