The global victory over ozone-killing chemicals is coming undone

Mysterious emissions have been slowing the atmosphere's healing. Scientists think they've finally discovered the source.

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Refrigeration chemicals helped drive Arctic warming

Chemicals used in refrigerators and freezers may have been responsible for half of Arctic climate change in the past 50 to 60 years, scientists say.

Banned ozone-harming gas, once on the rise, declines again

Emissions of CFC-11, which had risen unexpectedly since 2012, appear to have fallen off in the last two years.

Healing the ozone layer: A ray of hope for planet Earth?

After a decades-long ban on harmful ozone-depleting chemicals, the ozone layer is finally healing. Could this be a model for tackling other environmental problems like climate change?

More evidence points to China as source of ozone-depleting gas

Delegates from nearly 200 countries are gathering in Ecuador to discuss efforts to repair the ozone layer, and the return of a banned chemical will be on the agenda.

In a high-stakes environmental whodunit, many clues point to China

Scientists say new production of a banned industrial chemical is damaging the ozone layer. Investigations by The Times and an independent environmental group lead to factories in China.

Mysterious emissions of banned greenhouse gas traced to Chinese factories

Illegal production of CFC-11 in China has a climate impact equivalent to 16-20 coal power plants, the Environmental Investigation Agency estimates.

Banned ozone-harming gas creeps back, suggesting a mystery source

CFC-11, once commonly used as a refrigerant, has been outlawed for nearly a decade. Scientists suspect it is being produced again, likely in East Asia.

Living on Earth: Beyond the headlines.

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Why did we use leaded petrol for so long?

Leaded petrol was safe. Its inventor was sure of it.

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We saved the whale. The same vision can save the planet.

“Hope is essential – despair is just another form of denial,” Al Gore said last week, in an interview to promote the sequel to his 2006 climate change documentary An Inconvenient Truth. As well as the very bad news of Donald Trump’s science-denying presidency, An Inconvenient Sequel: Truth to Power, which opens in the UK today, brings good news: the plummeting cost of renewable electricity and the 2015 Paris climate agreement.

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Thirty years after the Montreal Protocol, solving the ozone problem remains elusive.

Despite a ban on chemicals like chlorofluorocarbons, the ozone hole over Antarctica remains nearly as large as it did when the Montreal Protocol was signed in 1987. Scientists now warn of new threats to the ozone layer, including widespread use of ozone-eating chemicals not covered by the treaty.

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Court ruling on HFCs deals another blow to Paris climate goals.

A U.S. court ruled the EPA lacked authority to regulate the powerful greenhouse gases, used for cooling and refrigeration. Industry had supported the regulations.

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