Global warming - RationalWiki
on the harmful consequences of the ozone depletion on human health. Implications for as the ozone layer depletion, global warming, greenhouse effect, acid. Information about the ozone hole and global warming. The ozone hole is not a mechanism of global warming, but both the ozone hole and. The phrase was a public relations construct to mislead and exploit The entire story of ozone depletion due to Chlorofluorocarbons . Global warming and ozone thinning each began with a hypothesis .. In prior posts he starts his formulaic essays with a quotes from Winston Churchill or John Saul etc.
In this case, these companies appear to have deceived their own nation. As the EIA report showed, one company had even painted the side of its building to declare it as a "farming plantation. Luckily, the Chinese government already has a head start. The EIA provided an earlier copy of the report directly to them before releasing it publicly.
The penalties for flouting the Montreal treaty, including seizures and arrests, should be severe enough to discourage future violations, said Mahapatra. Even so, cutting off these emissions will likely make a meaningful difference. Already, the ozone layer's recovery will take decades.
Earlier this year, NASA scientists estimated it could take until, or longer.
- Is There a Connection Between the Ozone Hole and Global Warming?
- Global warming
And illegal polluting certainly won't help any. CFCs were widely used in aerosol products, fire-fighting equipment, foams, refrigerators and air conditioning systems until it was understood how harmful they were to the ozone layer, which provides the earth essential protection from the sun. The new addition to the Montreal Protocol agreed earlier this month has taken on its next big challenge, now that CFCs have virtually disappeared from products. Ninety-eight per cent of all ozone-depleting substances have been phased out.
Why the Montreal Protocol is the most successful climate agreement ever
Chlorine and carbon are both offending substances in chlorofluorocarbons. Chlorine depletes ozone, but given their carbon content, CFCs are also a greenhouse gas. Despite its focus on ozone, therefore, the Protocol clearly has climate change implications.
Ninety-eight per cent of all ozone-depleting substances have been phased out But precisely because of that focus, The Protocol had the incidental effect of increasing the use of hydrofluorocarbons as substitutes.
HFCs have become the fastest growing source of greenhouse gas emissions, increasing at between 10 and 15 per cent annually. CFCs and HFCs are extraordinarily potent greenhouse gases, thousands of times more damaging than carbon dioxide. So something urgent needed to be done about HFCs, and that is what the Montreal Protocol has just achieved — an agreed phase-out of HFCs starting in The technology for alternatives to fluorocarbons is available, but substitution will take time, especially in lower-income economies.
People, plants, and animals living under the ozone hole are harmed by the solar radiation now reaching the Earth's surface—where it causes health problems, from eye damage to skin cancer.
Stratospheric ozone is constantly produced by the action of the sun's ultraviolet radiation on oxygen molecules known as photochemical reactions.
Is There a Connection Between the Ozone Hole and Global Warming? | Union of Concerned Scientists
Although ozone is created primarily at tropical latitudes, large-scale air circulation patterns in the lower stratosphere move ozone toward the poles, where its concentration builds up.
In addition to this global motion, strong winter polar vortices are also important to concentrating ozone at the poles. During the continuously dark polar winter, the air inside the polar vortices becomes extremely cold, a necessary condition for polar stratospheric cloud formation.
Polar stratospheric clouds create the conditions for drastic ozone destruction, providing a surface for chlorine to change into ozone-destroying form.
Why the Montreal Protocol is the most successful climate agreement ever | South China Morning Post
They generally last until the sun comes up in the spring. NASA In the s, scientists discovered that the ozone layer was thinning in the lower stratosphere, with particularly dramatic ozone loss—known as the "ozone hole"—in the Antarctic spring September and October.
These chemicals can remain in the atmosphere for decades to over a century. At the poles, CFCs attach to ice particles in clouds. When the sun comes out again in the polar spring, the ice particles melt, releasing the ozone-depleting molecules from the ice particle surfaces. Once released, these ozone-destroying molecules do their dirty work, breaking apart the molecular bonds in UV radiation-absorbing ozone. The Montreal Protocol Anniversary poster of the Vienna Convention for the Protection of the Ozone Layerthe first international cooperation effort to protect the ozone layer.
Global warming caused by chlorofluorocarbons, not carbon dioxide, new study says
United Nations Environmental Program. CFCs were commonly found in refrigerants, solvents, propellants, and foam-blowing agents before the Montreal Protocol was agreed on in the s— an international commitment to phase out ozone-depleting chemicals that was universally ratified by all countries that participate in the UN.
The Montreal Protocol set an important precedent but more needs to be done. It appears unlikely that the decrease in ozone-depleting substances alone will lead to the recovery of the stratospheric ozone layer to its pre concentration levels because of the competing and uncertain effects of further climate change. In a worrying development, after an extremely cold winter in earlyfor the first time the ozone reduction in the Arctic was comparable to that in the Antarctic.