Canada once had a shot at being the world's leader on climate change. Back in 2002, our northern neighbors had ratified the Kyoto Protocol, the world's first treaty that required nations to cut their emissions or face penalties. In 2005, the country hosted an international climate change conference in Montreal, where then-Prime Minister Paul Martin singled out America for its indifference. "To the reticent nations, including the United States, I say this: There is such a thing as a global conscience," Martin said.

Australia, too, was briefly a success story. The government ratified Kyoto in 2007 and delivered on promises to pass a tax on carbon by 2011. The prime minister that year, Julia Gillard, noted her administration's priorities to set "Australia on the path to a high-skill, low-carbon future or [leave] our economy to decay into a rusting, industrial museum."

Today, the two countries are outliers again—for all the wrong reasons.

According to a 2014 Climate Change Performance Index from European groups Climate Action Network Europe and Germanwatch, Canada and Australia occupy the bottom two spots among all 34 countries in the Organization for Economic Co-operation and Development (OECD). Among the 20 countries with the largest economies (G20), only Saudi Arabia ranked lower than them. Canada and Australia's records on climate change have gotten so bad, they've become the go-to examples for Republicans, like Senate Minority Leader Mitch McConnell, who don't think climate change exists.

How did these two nations go from leading the fight against climate change to denying that it even exists?

On the way to his first trip in the U.S., Australian Prime Minister Tony Abbott stopped for a full day of talks with Canada Prime Minister Stephen Harper in June. The Sydney Morning Herald reported that Abbott was in Canada's capital with the intention of building a "conservative alliance among 'like-minded' countries" to try to dismantle global efforts on climate change. At a press conference that day, Harper applauded Abbott's efforts to gut Australia's carbon tax. "You’ve used this international platform to encourage our counterparts in the major economies and beyond to boost economic growth, to lower taxes when possible and to eliminate harmful ones, most notably the job-killing carbon tax," Harper said. He added that "we shouldn't clobber the economy" by pursuing an emissions trading scheme or a carbon tax. 

This is how Canada and Australia's top leaders frame global warming. The two stress that they will always choose short-term economic gain first, disregarding scientific findings and even the interests of their political allies in the process.The countries' abrupt shift on climate track conservatives' rise to a majority in Canada in 2011 and in Australia last year. 

In just a few years, conservatives have delivered blow after blow to the nations' environmental progress. Canada withdrew from Kyoto in 2011 to avoid paying expensive penalties for failing to meet its promise to cut carbon 6 percent over 1990 levels (Canada's emissions had risen by nearly 30 percent). Harper offered a less ambitious target instead, one that mirrored the U.S.'s commitment cut 17 percent of carbon pollution by 2020. But Canada will miss that target by a long shot, according to environmental groups who point to the aggressive development of the Alberta tar sands oil and expired clean energy subsidies. The commissioner of the Department of Environment and Sustainable Development noted in a recent report that Canada "does not have answers" to most of its environmental concerns. Australia, meanwhile, had the world's highest emissions per capita in 2012—topping even America's. The government's mediocre ambition of cutting emissions 5 percent by 2020 won't happen either: It projects emissions to grow 2 percent a year, according to Inside Climate News.

The hostility toward environmental interests goes even deeper than energy policy. Harper has battled his own scientists, independent journalists, and environmental groups at odds with his views. 

Climate scientists have reported that they are unable to speak to press about their own findings, feeling effectively "muzzled" by agencies that want to script talking points for them. In June, a government spokesperson explained that federal meteorologists must speak only "to their area of expertise," which does not include climate change, according to a government spokesperson. Journalists sometimes face bullying, too. Environmental author Andrew Nikiforuk told ThinkProgress that "a government of thugs" slandered him and shut him out of events. But environmentalists may fare the worst. Seven environmental nonprofits in Canada have accused the Canada Revenue Agency of unfairly targeting them for audits. According to internal documents obtained by The GuardianCanada's police and Security Intelligence Service identified nonviolent environmental protests—like people who oppose hydrofracking and the Keystone XL tar sands pipeline—as "forms of attack" fitting the "number of cases where we think people might be inclined to acts of terrorism." 

Australia, for its part, has downplayed scientific findings. Abbott, along with his Environment Minister Greg Hunt, have rejected any link between extreme weather and global warming. Abbott, who once called the science of climate change "absolute crap," said last year that UN Climate Chief Christiana Figueres was "talking out of her hat" when saying that rising temperatures were driving more intense and frequent brushfires. "Climate change is real as I have often said and we should take strong action against it but these fires are certainly not a function of climate change," he argued. Hunt defended his boss, citing Wikipedia as his proof. "I looked up what Wikipedia says for example, just to see what the rest of the world thought, and it opens up with the fact that bushfires in Australia are frequently occurring events during the hotter months of the year. Large areas of land are ravaged every year by bushfires. That’s the Australian experience." He could have referred to his Department of Environment's website instead, had it not earlier removed explicit references connecting climate change, heatwaves, and fires.

As the host of the G20 this November, Australia is in an awkward position. Australians have staged protests, while the U.S. and European leaders have pressured Abbott to put climate change on the agenda. He has refused. There's no room for climate, he says, because the summit is about "economic security" and "the importance of private sector-led growth."

What's even more baffling about the rise of climate denial in both countries is that it's apparently not the popular view in either country. According to the Pew Research Center, the majority of Australians and Canadians say climate change is a major threat—as opposed to 40 percent of Americans who say the same. 

Of course, the U.S. has reversed itself recently, too. President Barack Obama is making climate change a second-term priority, and has taken steps to cap carbon pollution from power plants. Such initiatives have put the U.S. on track to meet its pledge in Copenhagen in 2009 to reduce greenhouse gas emissions 17 percent by 2020. At the same time, China, which faces internal pressure over air pollution, is looking a lot more serious about slowing down pollution; it will begin a national cap-and-trade program in 2016. Even India is redoubling efforts on clean energy, to meet the power needs of its growing population. Half the world plans to put a price on carbon

It's true that neither Canada nor Australia has much responsibility for the amount of heat-trapping gasses in the atmosphere. The United States, China, and India make up a combined 49 percent of the world's carbon emissions in 2013. Canada and Australia, by comparison, emit 3.5 percent of total carbon emissions combined. But the critical requirement for an international climate change agreement—which negotiators will try to hammer out in Paris next year—is that every country big and small make a commitment to greenhouse gas targets. Fortunately, the negligence of two smaller, industrialized countries won't be the fatal blow to negotiations in Paris. Still, by ducking their own responsibility, Australia and Canada are ignoring their "global conscience"—to borrow a former prime minister's words. 

A decade ago, our close allies due north and across the Pacific rightly shamed us on our poor response to climate change. Now, they've lost the moral high ground. At the September United Nations Climate Summit, the largest gathering of world leaders yet on the issue, both Abbott and Harper were no-shows. The ministers sent in their place also arrived empty-handed; Australia's foreign minister suggested that only larger countries should be responsible for more ambitious climate action. Canada Environment Minister Leona Aglukkaq repeated an already-public commitment that Canada would copy Obama's fuel economy regulations requiring 35.5 miles per gallon. Afterward, in an interview with the Globe and Mail, Aglukkaq spoke of the unfairness of a global treaty. "It’s not up to one country to solve the global greenhouse-gas emissions. I mean, seriously now, it’s just not fair. We all have to do our part, big or small countries.”

That's true. If only her small country would do its part, too.