When thousands of activists descend on Manhattan this Sunday for the People's Climate March, faith-based groups will be among them. Dozens of religious organizations and churches have signed up to join in demanding action to fight global warming. But as the Rev. Dr. Carroll A. Baltimore, former president of the Progressive National Baptist Convention, says, religious groups' road to the march has been slow and rocky.

Some factions of Christianity, such as evangelicals, have an inherent mistrust of science that for years contributed to widespread denial of climate change. Others—in poverty-stricken, minority communities, for example—put a lower priority on global warming. But as natural disasters fueled by climate change devastated the lives of billions of people, global warming became less a scientific issue and more a moral one. Religious communities across the planet began calling for action.

Baltimore, currently the CEO of Global Alliance Interfaith Networks, plans to walk alongside other religious leaders in Sunday's march. He spoke with InsideClimate News about who within the faith community has led the charge on climate change, the power of America's clergy in shifting the nation's climate conversation, and the impact of moral argument. This conversation has been edited for brevity and clarity.

ICN: When and why did you personally start paying attention to the climate issue?

Baltimore: I've been doing ministry in the Philippines for 30 years. I started noticing about 10 years ago that the weather patterns were changing. The rainy seasons, the typhoons, were becoming more intense and longer. You couldn't predict it anymore. They were taking more lives. It was costing my organization more and more money to keep the ministry in the Philippines going. So I started reading and researching and watching, not just there, but in the U.S., too.

ICN: How did you bring that knowledge and experience back to the U.S.? 

Baltimore: In 2010, I became president of the Progressive National Baptist Convention. During that time, we weren't talking about climate change. People were looking at me like, "that's an unknown subject. You don't talk about going green. About environmental change." I got involved with other groups, including Interfaith Power and Light and Earth Day, and began marching and demonstrating to highlight it. I had to do a lot of teaching about being stewards and managers of the earth. It started to catch on. But even today, it is a very slow process in the African American religious neighborhoods.

ICN: What has the evolution of climate change been like in the faith community? Have certain sectors embraced the need for climate action before others?

Baltimore: It has been a very slow process. And it depends on what section of society you're in culturally, what neighborhood you're in, what region of the country you're in. In some churches, people are just trying to survive from day to day. Families are still trying to educate their children or put food on their table. So when you talk about climate change, that's not even on the agenda. 

The Episcopal Church has been leading on climate change for a while. Some Catholic priests as well, such Father Paul Mayer, who passed last year, but who helped found the group Interfaith Moral Action on Climate. Also, Lutheran groups have been at the forefront.

ICN: One of the strategies I've noticed is that religious groups don't frame climate change as a scientific or environmental issue, but as a moral one. Why is that so impactful? 

Baltimore: The moral argument really connects with most people. We can grasp that. We can see it as securing our future, making it safe for the next generation, for our children. No matter whether Christian or non-Christian, all faith traditions teach that we have a moral obligation to take care of creation. We are stewards. That's why the moral argument is so powerful in motivating faith communities to act. 

ICN: Studies have shown a correlation between evangelicals and a mistrust in science, causing them to doubt evidence that the world is warming more than the American public in general. Why do you think that mistrust is there?

Baltimore: Very simply, a lack of knowledge. A narrow scope of understanding.

ICN: What impact do you think this doubt by such a large, politically powerful group in the U.S. has had on the progress of climate action nationally? 

Baltimore: I think it has had a tremendous negative impact on progress. Propaganda slows down the wheels of progress, and there's been a lot of propaganda [in the climate debate]. 

ICN: How do you get evangelicals to care about climate change? 

Baltimore: With the message that we are Earth's caretaker. We must look at the situation as if we are literally choking the life out of creation itself. If you travel to some of the remote areas of this nation and this world, you can see the devastating impacts of climate change on not just human beings, but wildlife and ecosystems. You can't help but feel the pain in your own life. And you need to realize that you're responsible for what is happening here.

ICN: Historically, the environmental movement has been fairly homogenous: middle class and white, as one historian toldInsideClimate recently. But that seems to have changed in recent years. What role have African Americans church leaders played in this? 

Baltimore: I think we are slowly getting involved, but unfortunately, like with many topics, African American leaders haven't really been invited to the table. We've been left out of most of the meetings and gatherings dealing with religion and climate change. Maybe it is because they think we don't have an expertise on this. 

ICN: There are dozens of faith-based groups converging on New York this week, for the Religions of the Earth conference, in which you are participating, and the People's Climate March. What makes this moment so special? 

Baltimore: It is a history-making event. I think this is a moment in time where we make an impact, to really get this message over to our leaders, particularly our political leaders. We must seize this moment. If we don't seize it, we are missing the opportunity to bring about powerful change. 

ICN: There are wide swaths of the American public who trust their pastors more than the news. Doesn't that put the clergy in an incredibly powerful position in terms of changing the tide of the climate movement? 

Baltimore: Yes. They can play a big role. However, there is a spirit of mistrust in America right now between the political sphere and the spiritual sphere. I probably shouldn't say this, but it is what I feel. I've been in ministry a long time—48 years—and you can feel the tension. There's mistrust everywhere. It calls for more responsibility, working to solve that problem, if we're going to get anything done. 

ICN: Do you see any change in that mistrust? Have the last few years made any difference?

Baltimore: I think so. I'm looking at my grandchildren and can see that change is on the horizon. That change is part of the reason people are converging on New York this weekend. 

Earth Day offers an opportunity to reflect on the important work that’s been done to create laws that protect our air, water, and endangered species — and to recommit to protecting our planet. At this pivotal moment, we can no longer ignore the world’s highest carbon emissions to date or the rapidly rising sea levels and global temperatures.

Climate change is real and affecting us all. We know this not only from scientific data, but also from our churches and synagogues across the United States and around the globe. We know that we are damaging our earth irreparably because we hear about it when we speak to our pastors and rabbis in California who are grappling with devastating drought, and in Miami and the Chesapeake Bay area where they are watching their shorelines shrink. We know the effects of inadequate environmental protections because our community members are breathing in air pollution from unregulated power plants and drinking water from sources contaminated by toxins.

If these challenges are not enough to call us to act with urgency, then we must heed our moral obligation to protect the environment. This imperative comes from Genesis 2:15 where God commands Adam to “till and tend” the Garden of Eden. For both of our faiths, this obligation extends far beyond the Garden and throughout the generations.

We believe that it is our sacred duty to be protectors and stewards of God’s earth. As we pass down our faith traditions to our children and our children’s children, we pass with it the natural world and our promise to be guardians of the planet and its finite resources.

Protecting the environment ensures the safety of our communities and our families. Lack of action to mitigate the effects of climate change has led to climate injustice, disproportionately affecting people of color and those living in poverty. Our faith traditions teach us that inequity is unsustainable and that we must work to right these wrongs.

Proverbs 31:9 tells us to “champion the poor and the needy.” We pursue environmental justice because we must protect our earth, and because the burden of our global inaction falls squarely on the backs of the most vulnerable among us.

This year on Earth Day, we remain firm in our commitment to righting the wrongs produced by our increasing carbon emissions and our failure to safeguard our communities from the harms caused by climate change. We remain hopeful that we have the time, resolve, and capacity to make change. We remain hopeful that we can create climate justice where there is injustice, environmental sustainability where there is now the erosion of vital resources, and adaptation to climate change where there is none.

The effects of climate change are already being felt and cannot be undone, but we affirm this Earth Day that we will remain steadfast in our commitment to environmental stewardship.

This year, President Obama has asked Congress to put $500 million towards the 2016 Fiscal Year budget for the Green Climate Fund. The Green Climate Fund is intended to equally support adaptation to the effects of climate change and mitigation of its root causes in developing countries and countries most vulnerable to climate-related disasters.

Both developing and developed countries have pledged money to the fund, and it is now up to the United States, as a global leader, to put forward our promised contributions and guarantee that the fund becomes a reality.

The Green Climate Fund stands at the intersection of our faith priorities by addressing climate injustice at its dual sources. The Fund puts money towards helping the global poor of today adapt to the harsh realities of climate change that they experience. And the Green Climate Fund goes even further by helping developing countries minimize the harm we do to our climate by providing investments in sustainable development and ensuring the protection of our children and our children’s children.

Congress must act now to allocate funds for international sustainable development and climate change adaptation, affirming our commitment to the Green Climate Fund. This Earth Day finds us at a critical juncture in our history when we can see the effects of climate change and injustice and are still capable of putting a stop to our unsustainable treatment of our earth.

This Earth Day, we ask that Congress take seriously our needs as global citizens, as people of faith and as communities concerned about our futures and our children’s futures and move forward on the Green Climate Fund.

Rev. Dr. Carroll Baltimore is the past President of the Progressive National Baptist Convention and Rabbi Jonah Dov Pesner is the Director of the Religious Action Center of Reform Judaism.