The Montreal Protocol has successfully reduced the use of chemicals that destroy the Earth’s ozone layer.
Atmosphere image from www.shutterstock.com
Hydrofluorocarbons were created to replace ozone-damaging chemicals – but they turned out to be major contributors to climate change.
Houston in 2002.
U.S. states need to put in place new ozone air quality standards, but how they are measured – based on peak ozone – doesn't always best reflect a city's overall air quality.
Smog over Mexico City: bad air quality has led to limits on when people can drive their cars in the city.
Mexico City is suffering through an air quality crisis this spring, but institutional corruption is making the proposed solution – restricting car usage – ineffective.
Aided by expanded farming in Asia, there’s been a global increase in greenhouse gases from farming.
The Paris climate summit yielded a pact to reduce air pollutants that contribute to global warming but missed a chance to address the interlinked effects of agriculture and climate.
A worker at a coal power plant in China.
The greenhouse gases that cause climate change will take centre stage at the upcoming Paris climate talks. What are they and what are their effects?
Conflicting evidence means it's tough to tell whether trees helping to clear the air, or if green is not as good as we thought.
Ground-level ozone levels in US lag other countries’ guidelines for air quality.
The US has stricter ozone rules but the limits lag guidelines set by some other countries and more coordination in regulation is needed to address air pollution globally.
Traffic is one of the major sources of pollution worldwide, particularly in Asia’s packed cities.
Outdoor air pollution causes 3.3 million premature deaths a year, mainly in Asia. And without policies to cut particulate pollution from traffic, industry and home biofuels, the deaths could double by 2050.
Antarctica has actually been protected from sea ice melt by the ozone hole.
Many people think of sunburn and skin cancer when they hear about the ozone hole. But more ultraviolet (UV) radiation isn’t the only problem. The ozone hole has also led to dramatic changes in Southern…
In 2012 and 2013 parts of New Zealand suffered the worst drought in 70 years.
Over 2012 and 2013, parts of New Zealand experienced their worst drought in nearly 70 years. Drought is the costliest climate extreme in New Zealand; the 2012-2013 event depressed the country’s GDP by…
Ozone conditions as of September 7, 2014.
It sometimes feels as if environmental news is never good news, but that certainly isn’t true when it comes to the ozone layer. The UN has announced that the ozone layer is showing “signs of recovery…
So serious are the effects of air pollution on human health - the WHO recently categorised it as carcinogenic, responsible for 223,000 deaths a year worldwide - that it is easy to neglect its wider impact…
Flights entering and exiting Australia and New Zealand are responsible for the highest levels of ozone pollution created…
Much research is being done in the Arctic to find out what changes there will mean for the rest of the world. One scientific…
Increases in ground-level ozone make it hard for insects to interact with the plants they rely on. Insects rely on olfactory…