Environmentalists, scientists and lawmakers have renewed public relations efforts to put global warming plainly before Americans' eyes and also rebut opponents who say nothing is happening.

"Folks are enraged about this, rightly so, and are looking for ways to educate," said Peter Frumhoff, director of science and policy at the Union of Concerned Scientists.

Climate science hit a high-water mark with the media and public in 2007 when Al Gore and the U.N. Intergovernmental Panel on Climate Change won Nobel prizes for their work spreading the message. But the Democrat-led Congress and the White House were ultimately unable to translate that attention into a first-ever limit on domestic greenhouse gas emissions emissions.

Despite mounting evidence that the greenhouse gas buildup in the Earth's atmosphere is causing runaway changes to the climate – NASA this month declared 2010 the hottest year on record – several pollsters say the American public isn't listening.

In a recent survey, Anthony Leiserowitz, director of the Yale Project on Climate Change, found that the number of people in the United States who believe in global warming fell from 71 percent to 56 percent between 2008 and 2010. Just 34 percent of the public thinks there's scientific agreement on climate change, down from 47 percent two years ago.

Enter the next phase of the climate education campaign.

Advocates recognize their chances for passing cap-and-trade legislation are dead for at least two years, maybe longer. But they want to make sure the public and policymakers don't forget about the problem, especially with President Barack Obama insisting that he remains committed to lower-hanging fruit within the energy portfolio to try to get the job done. 

Several key moments are ahead for inflection on climate science. Obama's Environmental Protection Agency is pursuing emission reduction regulations hotly contested by industry and Republicans. A wide-open GOP presidential nomination campaign will test the political sway of conservative activists who say global warming is a scam. U.N.-led negotiations continue on whether to extend the Kyoto Protocol beyond 2012. And the Intergovernmental Panel on Climate Change will roll out its next assessment in 2013 and 2014, covering all the key bases from the physical science to adaptation and ways to reduce greenhouse gases.

Heidi Cullen, the CEO and director of communications at Climate Central, a non-profit media group, said she's trying to explain the scientific fundamentals to the American public while pinpointing solutions reflective of the size of the problem. She’s also trying to avoid frightening language.

"I think we need to approach it as a solvable problem," Cullen said. "There's a way to talk about this in sort of a rational, decision-based framework that has people saying, 'Oh, OK, I see the risks and what I can do about it’ without feeling overwhelmed."

Cullen has produced stories explaining when it is appropriate to make connections between daily weather like heat waves, storms and cold snaps – things that the public takes much greater notice of – and long-term climate projections linked to global warming. She's also focused on the costs if government doesn't act, as well local links like the need for greater emergency management equipment to protect Miami-Dade County’s multi-billion dollar tourism industry from stronger hurricanes and sea-level rise.

Sen. Joe Lieberman (I-Conn.), co-author of several unsuccessful climate bills over the last decade, said he agrees with the need to make more local connections for the public. Hitting home for him are studies showing lobster and winter flounder moving north out of Long Island Sound.

"It's not the end of the world, and yet it suggests the world is changing," Lieberman said. "It's one small example. The world is full of them."

Lieberman said he thinks there's a need for more TV and radio commercials that capture the most eye-catching images. “Just show people what's happening," he said. "Show them satellite pictures of the ice caps.”

Princeton University climate researcher Michael Oppenheimer said advocates will be effective in raising public awareness with a campaign that focuses on specific opinion leaders.

"This is just one among many" hefty issues competing for Americans' attention, alongside nuclear arms proliferation, health care and the federal deficit, he said. "And when the public is besieged by a plethora of complicated issues, they make their decisions not by looking granularly at the details, but mostly they look to people they trust."

Cullen said Obama should eventually play an important role as the nation's educator-in-chief. "I think it's really critical," she said. "It's absolutely required. I don't know when or if that can happen in the next two years. A lot of folks are feeling like it's not the time."

Deputy Interior Secretary David Hayes said in an interview that the Obama administration is engaged on several levels in climate education by bringing the latest science to land, water and wildlife managers. He cited an 11-year old water shortage in the Colorado River Basin. “It’s one of the worst droughts in history,” Hayes said. “And we’re bringing the data to the table.”