BEMIDJI, Minn. -- Scores of protesters have gathered in northern Minnesota in hopes of halting the Line 3 oil pipeline project. Native American activists and their allies want to stop construction as the work nears a final phase.

In what's being billed as a Treaty People Gathering, opponents this week rallied at the headwaters of the Mississippi River before marching to an area where the pipeline and river meet. Protesters say they're engaging in civil disobedience, including attempts to block a pumping station.

Tara Houska, tribal attorney and environmental and Indigenous rights advocate, livestreamed from some of the events, noting the movement centers around protecting natural resources for tribal communities.

"What's really important to us is our water, our lives, our children, our futures, the animals, the plants, the sacred all around us," Houska asserted.

Organizers expected crowds of at least 1,500. The latest opposition efforts come amid an expected court ruling this month on a challenge to the state's approval of Line 3.

The project is being carried out by Canada-based Enbridge Energy, which argued the move is needed because the existing line is aging, while adding Line 3 creates thousands of jobs. Construction is already past the halfway point.

A group calling itself Minnesotans for Line 3 issued a statement criticizing the protests, while claiming the new line will make it safer to transport energy, but Houska and the many opponents who have gathered in the region say they remain undeterred.

"Beautiful water protectors from all walks of life, standing together, standing strong, standing up for Mother Earth," Houska remarked.

Opponents continue to pressure President Joe Biden to intervene. They say the construction disregards Native American treaty rights. They also say Line 3 would cross more than 200 bodies of water in Minnesota, including dozens of wild rice lakes, as well as sensitive watersheds.

Media outlets with reporters at the scene of the protest, including Minnesota Public Radio, said authorities moved in late Monday to arrest protesters inside the pump station, as hundreds of other activists faced off with law enforcement outside the facility.

A new documentary looked at ways to reduce the human and environmental harms stemming from the mining of "critical minerals."

Without minerals like cobalt, nickel and lithium, there would be no cellphones, electric vehicles, solar panels or long-storage batteries.

Mira Rubio, who directed the documentary for the Trade Justice Education Fund, said people in mining communities often do dangerous work for poverty-level wages.

"In cobalt mines in the Democratic Republic of Congo, people, including children, who are making cents on the dollar, digging minerals that are ending up in $80,000 Teslas or iPhones, they're risking their health and yet they may never have access to clean air or stable electricity," Rubio pointed out.

She noted mining has also led to widespread deforestation and toxic pollution. The film, "CRITICAL MINERALS: Creating a Just & Sustainable Clean Energy Transition," will be screened at the Social and Economic Justice Film Festival in San Francisco next week.

Advocates want the government to use its arguments to negotiate agreements to enforce labor rights and environmental protections. They also support an international standard called free, prior, and informed consent, which would guard against corporate exploitation of indigenous communities.

Rubio explained the nation may already have enough aboveground minerals to meet much of the global demand, if products were designed to be recovered and reused rather than trashed.

"If we can mine less and use the minerals that are already out there by using a circular economic model, that would really help reduce the amount of emissions we're putting out and help make the transition more sustainable," Rubio contended.

Minnesotans are cooling off after last weekend's extreme heat but communities bearing the brunt of environmental injustice said there will be more climate extremes to contend with, prompting heightened outreach.

Researchers said the harmful impact of climate change is one of the drivers behind Latino populations migrating to the Midwest.

Josefina Gerónimo said destructive wildfires brought her from California to Minnesota. She acknowledged the move does not mean extreme weather events and other environmental harms are gone and noted her family is still prepared in case they are forced to evacuate.

"(We've packed) an extra pair of clothes, water bottles, maps, flashlights; an emergency to-go bag," Gerónimo explained.

It is not just preparations on her mind, since Gerónimo is a leader on the environmental justice committee for Minnesota's Communities Organizing Latino Power and Action. The panel is trying to foster more grassroots conversations about topics such as air pollution disproportionately harming Latino neighborhoods and an equitable transition to clean energy.

Gerónimo pointed out the topics came up in a collaboration with the Metropolitan Council as it develops a regional climate action plan for pursuing local strategies to reduce emissions. She added voices aligned with her group provided their input, and she hopes it will lead to more community engagement.

"A lot of the people that participated, they felt motivated after that collaboration to work on other projects or maybe attend their neighborhood association meetings," Gerónimo observed. "And maybe get more involved beyond the 'Hey, let's clean up for Earth Day!'"

Education is part of this outreach, with occasional periods of smoke from Canadian wildfires and other air quality issues affecting the communities. Committee members can recommend online tools to monitor the threats. Seeing it first hand out West, Gerónimo stressed Latino residents need more guidance on where to go and how not to be exploited during a climate emergency.

"Communities of color may not have as many resources," Gerónimo emphasized. "(They) may be victims to price gouging as they're trying to evacuate, trying to find a hotel or they don't know where evacuation zones are."

As federal electric vehicle incentives face potential rollbacks, a new study is highlighting the burden of gasoline costs on Black and Latino drivers, and policy interventions which can support equitable EV adoption to help ease the burden.

The Fuel Equity Report shows Blacks and Latinos are "superusers" of gasoline, spending on average 15% of their paycheck to fuel their cars. In Illinois, residents pay the second-highest gas taxes in the nation.

Shelly Francis, confounder and director of the advocacy group EVHybridNoire, said systemic factors like disinvestment in public transportation, economic segregation and long commute times all contribute to the disproportionate effects.

"They're also more likely on average to be driving these older, less fuel efficient cars due to income as well as financing barriers that they may experience," Francis pointed out.

The study says EV adoption could save Blacks and Latinos an average of $4,900 a year on fuel and maintenance but barriers like affordability, charging access and education persist.

The report found the top 10% of Black and Latino gasoline users are generally concentrated in smaller cities and rural areas with Chicago being an outlier hotspot. Francis noted the clusters are also where people are most disproportionately affected by air pollution.

"From a public health standpoint, overexposure is really detrimental to one's health," Francis emphasized. "Increasing your risk for a number of different types of cancer, a lot of respiratory diseases and illnesses. "

The study suggests targeted policies to encourage equitable adoption of EV for Black and Latino communities, including enhancing purchase incentives, expanding financing options, and increasing charging infrastructure in communities where top gasoline users live.

Francis stressed addressing the big misinformation gap about EVs is also crucial.

"Pushing more of those types of stories out there to show like the everyday driver," Francis urged. "It's not some fancy person living out in a castle somewhere, (it's) just regular folks who are trying to work, make ends meet and provide for their families."