About 20 years ago when Al Gore became VP, the government largely quit funding climate skeptics. Huge amounts of money were poured into grants for scientists willing to tow the line of global warming alarmism.
When the President and Secretary of the Interior make thinly disguised threats against skeptical scientists, it doesn’t leave much room for dissent. Thus a consensus is formed.
President Obama promised to remove politics from science, and did the exact opposite. He is attempting to drive science from the White House.