Climate change threatens progress in cancer prevention

Climate change increases exposure to cancer risk factors and impacts access to cancer care, warns the American Cancer Society. Risk factors include an increase in extreme weather events and dietary patterns.  

Climate change threatens prospects for further progress in cancer prevention and control, increasing exposure to cancer risk factors and impacting access to cancer care, according to a new commentary by scientists from the American Cancer Society and Harvard T. H. Chan School of Public Health.

The commentary says that progress in the fight against cancer has been achieved through the identification and control of cancer risk factors and access to and receipt of care. And both these factors are impacted by climate change, according to a statement.

Climate change creates conditions favorable to greater production of and exposure to known carcinogens, say the authors.

For example, global warming has been linked to an increase in extreme weather events, like hurricanes and wildfires. Both events can affect patients’ exposure to carcinogens and ability to seek preventive care and treatment; they threaten the laboratory and clinic infrastructure dedicated to cancer care in the United States.

The authors also propose ways to diminish the impact of climate change on cancer, because climate change mitigation efforts also have health benefits, especially to cancer prevention and outcomes. For example, air pollutants directly harmful to health are emitted by combustion processes that also contribute to greenhouse gas emissions.

Some dietary patterns are also detrimental to both health and the environment. The agricultural sector contributes to approximately 30% of anthropogenic greenhouse gas emissions worldwide. Meat from ruminants have the highest environmental impact, while plant-based foods cause fewer adverse environmental effects per unit weight.

“If all those whose life work is to care for those with cancer made clear to the communities they serve that actions to combat climate change and lessen our use of fossil fuels could prevent cancers and improve cancer outcomes, we might see actions that address climate change flourish, and the attainment of our missions to reduce suffering from cancer grow nearer,” write the authors.

Photo credit: Kris Krüg, flickr/Creative Commons

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