Relocation left Native Americans more exposed to climate threats
Centuries of WASHINGTON — land loss and forced relocation have left Native Americans significantly more exposed to the effects of climate change, new data shows, adding to the debate over how to address climate change and racial inequity in the United States.
The findings, which took seven years to compile and were published last Thursday in the journal Science, mark the first time that researchers have been able to quantify on a large scale what Native Americans have long believed to be true: that European settlers, and later the U.S. government, pushed Indigenous peoples onto marginal lands.
“Historic land dispossession is a huge factor contributing to extreme climate change vulnerability for tribes,” said Kyle Whyte, one of the study’s authors, who is a University of Michigan professor and a member of the Citizen Potawatomi Nation.
The new data comes as the United States suffers through increasingly severe heat waves, drought, wildfires and other disasters made worse by a warming planet. By demonstrating that government actions have made Native Americans more exposed to climate change, the authors argue, the data strengthens the case for trying to make up for that damage, however imperfectly.
“This is not just a story of the past harms,” said Justin Farrell, a Yale University professor and another of the study’s authors. “We have to think about ways to recompense for this history.”
To measure the effects of forced migration on climate exposure, the authors assembled a database showing the historical land bases and land loss of 380 individual tribes, based on data from tribal nations’ own records, land cession treaties and other federal archives. Most of the data spanned the period from the 1500s to the 1800s.
The authors then compared the amount of land that the tribes used to have with each tribe’s present-day reservations. In total, the amount of land shrank by 98.9%. In many cases, no comparison was possible: Of the 380 tribes they examined, 160 have no federally or state-recognized land base today.
But for the remaining 220 tribes, the authors found that their present-day lands, on average, are just 2.6% the size of their historical lands — an average reduction of 83,131 square miles.
In addition to occupying far less land, most tribes were pushed far from their historical lands. The average distance between historical and current lands was 149 miles; one tribe, the Kickapoo, moved 849 miles.
Not only were tribes pushed onto smaller lands far from their original territory; those lands also have less hospitable climates.
The authors measured exposure to extreme heat by tabulating the average annual number of days above 100 degrees Fahrenheit between 1971 and 2000 across each tribe’s present-day lands, and then doing the same for historical lands.
They found that overall, present lands experience two additional days of extreme heat each year. But for some tribes, the difference is far greater.
The Mojave tribe, whose current land is along the Colorado River, experiences an average of 117 days above 100 degrees or 62 more than on its historical lands.
The Hopi reservation, in northeast Arizona, recorded 57 days above 100 degrees on average, compared with just two days on their historical lands, which included higher ground. The Chemehuevi, along the California and Arizona border, experienced an average of 84 days of extreme heat each year, 29 days more than on their historical lands, which likewise included higher ground.
More extreme heat means higher electricity costs, according to Brian McDonald, secretary-treasurer for the Chemehuevi Indian Tribe.
He said those higher costs are especially challenging because many residents have low incomes.