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In their second round of debates, Democratic presidential candidates called for . As Washington Gov. Jay Inslee , “We are the first generation to feel the sting of climate change, and we are the last generation that can do something about it.”

Politicians realize that many voters care about this issue. A 2018 survey conducted by categorizes 69% of Americans as at least “somewhat worried” about climate change, the highest level these programs had recorded since 2008.

But climate is still an uncomfortable subject for many people. I study and the obstacles people encounter when discussing climate change. My new book, “,” considers Christians and the variety of ways they incorporate the environment into their faith.

Studying Christianity provides important insights into how to talk productively about climate change with a variety of audiences. I interviewed Christians from many different denominations and found that they don’t all think alike when it comes to the environment. Some reject environmentalism, some embrace it, and others modify it to fit their beliefs.

Christianity and the Environment

In 1967, historian Lynn White Jr. argued that Christian beliefs promoted the domination and exploitation of nature, and therefore were incompatible with environmentalism. Almost half a century later, polls showed that of all U.S. Protestants and Catholics believe the Earth is warming as a result of human actions.

There are notable exceptions, such as Pope Francis, who called for action to slow climate change in his 2015 .” Another prominent advocate for action is U.S. climate scientist and evangelical Christian Dr. Katharine Hayhoe. A growing number of Christians are joining the movement, which combines Christianity and the environment. But as recently as early 2018, they were .

Christians hold a diverse range of attitudes about the environment. I divide them into three categories – separators, bargainers, and harmonizers – based on my study of religious organizations (, , and ), and interviews I conducted. I chose these three groups because they exhibit primary characteristics of the three categories.

Separators believe that faith and the environment are at odds. They tend to think environmentalism threatens their faith. One separator who I interviewed argued that climate scientists use “good causes to further evil agendas.” This person thought environmentalism was an evil force.

Bargainers adopt some aspects of environmentalism, but reject or modify others. One bargainer I interviewed said, “The climate is changing. It’s been changing for millions of years and will continue to do so.” This person changed the definition of climate change to fit the belief that climate change is natural and nothing needs to be done to address it.

Harmonizers see environmentalism as an important part of being a good Christian. Although they are not climate skeptics, they may or may not actively engage in the environmental movement. One harmonizer I interviewed said that environmentalism “begins on an individual basis.” Another argued that you only “have control over your individual actions.”

Harmonizers sometimes limit their environmentalism to personal behaviors. Most of the harmonizers I interviewed did not call for political or public action to solve climate change.

Communication strategies

In my book I explain tailored ways to engage with Christians about climate, and offer the following three strategies as starting points for all climate conversations. I advocate that conversations with separators and bargainers should focus on changing environmental beliefs, while discussions with harmonizers should encourage them to take more environmental actions.

Strategy 1: Treat conversations as dialogues

Since there is overwhelming evidence that climate change is real, it may be tempting to act confident and even arrogant when discussing it with skeptics. But our conversation partners will pick up on those nonverbal cues. Communication scholar Richard Johannesen asserts that audience members can tell whether a speaker sees them as equal, inferior, or superior. People who expect to receive trust, good will, and attention should , even when they disagree with perspectives of others.

Strategy 2: Locate common values

Research shows that connecting climate change to people’s values is an effective way to gain their attention. For example, there is evidence that using ” – topics that are distinct from but related to the environment, such as technology and the economy – fosters positive attitudes toward the environment.

For example, instead of arguing that people should support pro-environmental policies because they will protect natural resources, it may be more effective to argue that such policies create jobs.

Strategy 3: Avoid relying on science

Scientific evidence can strengthen an argument, and some studies show that people largely change their views on climate change due to what the says. But other studies have found that .

In some cases, exposure to scientific facts causes people to double down on their previous held beliefs – a response also known as a . Accordingly, I encourage people not to rely solely on science in climate conversations.

The importance of engaging

Every Christian I spoke to for my research, even the separators, said that they valued the environment, even if they disagreed on specific policies. And , they were willing to speak with me about climate change even though it was a controversial topic.

While my book considers only Christians, I hope the strategies that I propose will help many people have better climate conversations. I argue that people who support climate change action should be ready to have difficult conversations. With the right tools, strategies and attitudes, people can feel ready to speak to each other about climate change and the Earth’s future.