Net zero by 2050 in England and Wales equals ‘an extra two million years of life’ | Greenhouse gas emissions

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A study finds that net zero greenhouse gas emissions in England and Wales by 2050 would result in an extra 2 million years.

The UK is legally committed to hitting net zero by 2050. Many of the proposed policies would reduce harmful environmental factors such as air pollution, and encourage healthy behaviors including diet and exercise, but this is the first time researchers have comprehensively modeled how net zero affects on health.

Implementing net-zero policies will lead to “significant reductions in mortality,” according to the study published in The Lancet Planetary Health.

The researchers found that the set of policies would result in at least 2 million more years lived across the populations of England and Wales by 2050.

“Our models confirm that there are significant health benefits to implementing net zero policies,” said Dr James Milner, of the London School of Hygiene & Tropical Medicine, who led the research. “These policies are not only essential to mitigate climate change, but also make us healthier.”

The study measured health benefits by looking at reduced mortality alone. However, in addition to driving reductions in the death rate, evidence suggests that net zero policies may also lead to people living with fewer health conditions.

The study suggests that retrofitting homes with insulation would account for 836,000 of the additional 2 million years, as long as ventilation measures are provided for upgraded homes.

“The central role that home insulation plays in delivering these health benefits is particularly remarkable,” Milner said.

“Housing in England and Wales is not as well insulated compared to other countries, so measures taken to improve household energy efficiency have proven particularly beneficial for reducing carbon emissions and improving health.

The energy and cost of living crises this winter have provided a long list of reasons why the UK has adopted an ambitious isolation policy; Our study adds better health to that list.”

The researchers looked at six net zero policies in four different sectors – electricity supply, transportation, housing and food. They used modeling to estimate how these policies would affect health, taking into account how much they reduce air pollution, make diets healthier and increase exercise.

The researchers considered two scenarios – a balanced pathway in which a 60% reduction in emissions is achieved by 2035 and a broad-based participation pathway in which behavior changes more rapidly regarding diet choices and travel.

They measured the impact of policies on health by looking at the number of extra years people would live across the entire population.

After retrofitting homes with insulation, the second and third largest policies to benefit health were switching to renewable energy to power homes and reducing red meat consumption – resulting in 657,000 and 412,000 life years gained, respectively.

Replacing car trips with walking or cycling resulted in 125,000 years of life, while switching to renewable energy to generate electricity resulted in 46,000 years of life. The shift to renewable energy has resulted in transportation gaining 30,000 years of life.

The balanced pathway led to an additional 2 million lives across the populations of England and Wales. Health benefits were better under the widespread participation pathway, with a total of 2.5 million life years gained by 2050.

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“If we move faster in adopting greener diets and active ways of traveling, the health benefits will be even greater,” Milner said.

The researchers pointed out several limitations of their study. But they also said the findings likely underestimate the health benefits of net-zero policies.

This, they explained, was because they could not model all of the potential health benefits — for example, reduced agricultural air pollution and less nitrogen dioxide pollution from transportation.

The researchers were also unable to capture the benefits of other countries whose net-zero policies apply to the populations of England and Wales, potentially reducing air pollution coming from, for example, mainland Europe.

Writing in The Lancet Planetary Health, the researchers concluded: “Achieving net zero emissions of greenhouse gases is likely to lead to significant public health benefits in England and Wales, where the cumulative net benefits are correspondingly greater with a trajectory necessitating faster and more ambitious changes, particularly in physical activity.” and diets.”

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