Sentences with phrase «ozone layer from»

In 1987, the Montreal Protocol was formed to address the depletion of the ozone layer from chlorofluorocarbons (CFCs) and other ozone - depleting substances.

At that time, there was also a newly perceived global atmospheric threat — the damage to the ozone layer from chlorofluorocarbons (CFCs) and other synthetic compounds — and an international solution in a treaty that banned the chemicals.

In the CFC story there was a significant time lag between scientists sounding the first warnings (Molina & Rowland 1974) about potential damage to the ozone layer from CFCs and the ultimately unstoppable political momentum to get rid of CFCs (Montreal 1987, London 1990, etc.).

I spent a few minutes Wednesday with F. Sherwood Rowland, the atmospheric chemist from the University of California, Irvine, who shared a Nobel Prize for his work revealing the threat to the ozone layer from CFC's and similar synthetic chemicals.

In 1933, an American, Auguste Piccard, used an infrared camera to photograph the Earth's ozone layer from onboard the hot air balloon Century of Progress.

But an international team of researchers, led by Oram, has now found an unexpected, growing danger to the ozone layer from substances not regulated by the treaty.

At present, the long - term recovery of the Ozone Layer from the effects of CFCs is still on track, but the presence of increasing dichloromethane will lead to uncertainty in our future predictions of ozone and climate.»

At present, the long - term recovery of the Ozone Layer from the effects of CFCs is still on track, but the presence of increasing dichloromethane will add some uncertainty to our future predictions of ozone and climate.»

Not exact matches

The Montreal Protocol required countries to phase out chlorofluorocarbon — or CFC — from use in refrigerators, air conditioners and other uses because it depleted the ozone layer.

• We are depleting the ozone layer, which protects us from the harmful effects of the sun's radiation.

Additionally, the horror would include catastrophic biological aftereffects from probable destruction of the ozone layer and a nuclear winter likely to end all plant and animal life on earth.

Nature may kick back at us from time to time — with erosion, pollution, holes in the ozone layer and so on — but we like to think that these are simply impersonal matters of ecological imbalance.

In three separate indoor UV chambers, Benca exposed the dwarf pines to 7.5, 10 and 13 times Berkeley's normal UV - B intensity, in line with estimates of the impact Siberian Trap eruptions would have had on the ozone layer if their emissions occurred over various lengths of time, ranging from 400,000 years to less than 200,000 years.

The ozone layer — a high - altitude expanse of oxygen molecules that protects us from the sun's ultraviolet rays — has been on the mend for the past decade or so.

Without a protective layer of ozone, life would be exposed to DNA - damaging ultraviolet rays from the sun.

Their work reveals that 60 % of the ozone vanished in a layer from 16 to 22 kilometers high.

The protective ozone layer is under attack from chlorine and bromine, which come from both synthetic chemicals and natural sources.

Even now, the ozone layer is not completely safe from solar attack.

Good news for fans of planet Earth: The seasonal hole in the ozone layer over Antarctica was at its second - smallest point in the past 20 years, according to new research from NASA and the National Oceanic and Atmospheric Administration (NOAA).

Mid-1980s: Ozone layer sees a noticeable decline from its average level of about 300 DU.

Those techniques have led to everything from the development of catalysts that remove poisonous carbon monoxide from car exhaust to the understanding of how ice crystals in stratospheric clouds supercharge atmospheric chlorine's ability to destroy the planet's protective ozone layer.

The team set out to measure air pollution in East Asia to figure out where the increase in dichloromethane was coming from and if it could affect the ozone layer.

The stratospheric ozone layer, a fragile shield of gas, protects Earth from harmful ultraviolet rays of the sun.

In addition to allowing firefighters to control fires from a safe distance, the FIT - 5 could also replace halon fluorocarbons, an effective fire - fighting tool until they were banned in 1994 after it was discovered that they destroy Earth's ozone layer.

That's because Earth lacked an ozone layer to protect it from UV light — which was far more intense 4 billion years ago than it is now.

Without the ozone layer, ultraviolet rays from the sun would reach the surface at nearly full force, causing skin cancer and, more seriously, killing off the tiny photosynthetic plankton in the ocean that provide oxygen to the atmosphere and bolster the bottom of the food chain.

CFCs were banned from spray cans in the United States and Canada in the late 1970s, and the appearance of a «hole» in the ozone layer over Antarctica in the early 1980s created an international consensus that CFCs must go.

In addition, particles of these clouds may descend and withdraw reactive nitrogen from the chlorine - activated layer — active chlorine is one of the substances mainly responsible for ozone destruction.

Since the ozone layer absorbs ultraviolet light from the sun, ozone layer depletion can lead to increased rates skin cancer, eye damage and other adverse consequences.

The reduced energy from the Sun sets into motion a sequence of events on Earth beginning with a thinning of the stratospheric ozone layer.

Rising methane levels are slowing the ozone layer's convalescence from chlorofluorocarbons.

Similar scandals erupted over the effects of scores of industrial applications, ranging from sulfur dioxide and acid rain, to certain aerosols and the hole in the ozone layer, to leaded gas and cognitive impairment, to the granddaddy of them all, fossil fuels and global climate change.

Over the last 50 years satellite and ground - based records over Antarctica show ozone column amounts ranging from 100 to 400 Dobson units, which translates to about 1 millimeter (1/25 inch) to 5 millimeters (1/6 inch) of ozone in a layer if all of the ozone were brought down to the surface.

The ozone layer helps shield Earth from potentially harmful ultraviolet radiation that can cause skin cancer, cataracts, and suppress immune systems, as well as damage plants.

Scientists from NASA and NOAA have been monitoring the ozone layer and the concentrations of ozone - depleting substances and their breakdown products from the ground and with a variety of instruments on satellites and balloons since the 1970s.

In Earth's atmosphere, this compound forms the ozone layer that protects us from the Sun's harmful UV radiation.

Ozone in the upper atmosphere normally forms a protective layer that shields us from the sun's ultraviolet radiation.

Earth in the days when life was just beginning had no protective ozone layer, so light - dependent, iron - oxidizing bacteria formed iron minerals around themselves to protect them from damaging ultraviolet rays.

Higher levels of ultraviolet radiation penetrating the Earth's dwindling ozone layer may be driving some species of frogs to extinction, according to researchers from Oregon.

Up in the stratosphere, the ozone layer absorbs harmful UV radiation coming from space — protecting humans, animals and plants from the damage UV does.

Yet, chlorofluorocarbons, to give them their proper name, are potent molecules that both exacerbate the blanket of greenhouse gases warming the world as well as chew up the stratospheric ozone layer protecting the planet's inhabitants from excess doses of ultraviolet sunlight.

Blamed for everything from E numbers to the destruction of the ozone layer, the chemicals industry has every reason to feel unloved, despite the widespread benefits that it has brought to every aspect of daily life, not least the paper and inks that bring us New Scientist every week.

This weakened shielding would have allowed more energetic particles into the upper atmosphere, which would have begun to break down the ozone layer that protects Earth from harmful UV radiation, Meert says.

Rapid reversals of Earth's magnetic field 550 million years ago destroyed a large part of the ozone layer and let in a flood of ultraviolet radiation, devastating the unusual creatures of the so - called Ediacaran Period and triggering an evolutionary flight from light that led to the Cambrian explosion of animal groups.

The ozone layer protects life on Earth from the Sun's harmful ultraviolet rays.

Once aerosols are that high they can spread globally, destroy the ozone layer that protects us from ultraviolet radiation and exacerbate global warming, researchers warn.

Radiation from that blast would wipe out Earth's ozone layer, and we'd be fried by the sun.

At a symposium in Germany last week, atmospheric chemists debated for the first time whether aircraft should be banned from the stratosphere in order to protect the ozone layer.

Pollutants that gather from India and China in the lowlands around the mountains can be boosted as high as 18 kilometers, reaching the stratosphere — the atmospheric layer directly above the troposphere that contains most of Earth's ozone.

They also tolerated periods of temperatures up to 41 °C and, separately, high ultraviolet radiation — which might come about from damage to the ozone layer.