Environmentalists Question Whether Plastic Can Help Combat Rising Temperatures

As heat waves battered power grids across North America, Europe, and the Middle East during the summer of 2025, a growing field of materials science has been pitching plastic as part of the answer to rising global temperatures. Researchers developing radiative cooling technologies, which scatter sunlight and emit heat into space, have turned increasingly to polymer films and fluoropolymer-based coatings. Environmentalists, however, are raising pointed questions about whether fighting one crisis with a material central to another makes any sense at all.

Scientists predict 2026 is likely to become the fourth year on record where global temperatures hit 1.4°C above preindustrial levels, edging dangerously close to the 1.5°C limit outlined in the Paris Agreement. That urgency has accelerated interest in passive daytime radiative cooling, a technology that uses specially engineered materials to deflect solar radiation and beam thermal energy out through the atmosphere and into space, reducing surface temperatures without additional energy consumption. Companies like SkyCool Systems have developed photonic films applied to panels that deflect heat at infrared wavelengths.

The core environmental objection centers on what those films are made of. The cheapest and toughest materials used in radiative cooling tend to rely on Teflon and other fluoropolymers, "forever chemicals" that do not biodegrade, posing an environmental risk. Researcher Aaswath Raman, whose work has been central to advancing the field, has acknowledged the dilemma directly, noting that fluoropolymers are "the best class of products that tend to survive outdoors" while questioning whether large-scale deployment can proceed without them and still remain affordable.

The concern is not just about the cooling materials themselves. Plastics are threatening the ability of the global community to keep global temperature rise below 1.5°C, as greenhouse gases are emitted throughout the plastic life cycle, from extraction and refining to manufacture and disposal. A 2024 report from the Lawrence Berkeley National Laboratory estimated that plastic production creates about 5 percent of all greenhouse gas emissions, more than all shipping or the entire airline industry combined.

Compounding the problem, plastic pollution is not a passive bystander to warming; it actively makes warming worse. New research suggests microplastics are disrupting the marine life that helps oceans absorb carbon dioxide, while also releasing greenhouse gases as they break down, undermining one of Earth's most powerful climate defenses. A recent study found that microplastic-induced mortality in fish quadrupled with a rise in water temperature.

A 2025 UN report estimates that annual plastic production now exceeds 400 million tonnes, half of which is designed for single use. Against that backdrop, deploying yet more plastic-based materials at scale, even materials designed to lower temperatures, strikes many environmentalists as compounding the root causes of the crisis they are meant to address.

The debate reflects a broader tension in climate solutions: the pressure to act fast on symptoms can conflict with the slower work of addressing causes. Fluoropolymers may scatter sunlight effectively, but their persistence in ecosystems and the emissions embedded in their production mean that any accounting of their climate benefit must also weigh a significant environmental cost. As radiative cooling moves from laboratory to rooftop, that accounting is becoming harder to avoid.