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Ozone-Depleting Substance Causes Half of Arctic Warming – http://www.newsgram.com/

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People attend a climate change protest in Brussels, Belgium. VOA

Does fighting climate change mean wrecking the economy?

That’s the question my editor posed to me about a year ago. It has been the focus of my reporting ever since.

The rhetoric from climate change skeptics suggests it would. President Donald Trump has made canceling Obama-era greenhouse gas regulations a central part of his tenure. Economic rationales are always front and center.

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Meanwhile, Democratic presidential candidates say they will create millions of jobs by transforming the energy system to carbon-free sources.

Climate economy
A graph depicting how the economy is growing in Massachusetts despite the climate change. VOA

Job killer or job creator? Leaving aside for the moment the fact that climate change is already imposing enormous costs that are only becoming worse, I went looking for answers in Massachusetts, Wyoming and Colorado.

Here’s some of what I learned. It’s not simple. And much remains to be seen.

1. Where steps have been taken, the economy has kept growing. 

Take Massachusetts, for example. The Bay State passed the Global Warming Solutions Act in 2008, calling for an 80% reduction in greenhouse gases from 1990 levels by 2050. Massachusetts requires power plants to pay for their carbon dioxide emissions. The state was among the first to require power companies to generate a certain portion of their electricity from renewable sources. The government offers rebates and incentives for renewable energy, energy efficiency, electric vehicles and more.

Greenhouse gas emissions have come down by 17% from 2008 to 2017 in the state.

Meanwhile, Massachusetts’ economy has continued to grow. The state’s total output went up by 19% in that period, outperforming U.S. economic expansion as a whole by 3% in that time frame.

Employment went up in Massachusetts by 9%. The state has invested in growing a clean-energy economy. Jobs in renewable energy, energy efficiency and related areas have grown by 86% since 2010 and now make up more than 3% of the state’s workforce.

It’s hard to know, though, to what extent the state’s climate policies were responsible for either the greenhouse gas reductions or economic growth. From 2008 to 2017, carbon emissions went down in every state but six: Idaho, Nebraska, North Dakota, Mississippi, Texas and Washington. GDP shrank in just four states: Connecticut, Louisiana, Nevada and Wyoming.

That’s largely because cutting carbon has become much easier to do with the rise of natural gas and renewable power.

2. Some of the most significant greenhouse gas reductions have happened not because of state policies but because of dramatic shifts in energy markets.

Climate economy
Wind turbines produce green energy in Nauen near Berlin, Germany. Stephan Kohler, who heads the government-affiliated agency overseeing Germany’s electricity grid. VOA

The biggest factor lowering carbon dioxide emissions nationwide is that natural gas has replaced coal as the main fuel for electric power plants.

Burning natural gas generates the same amount of energy with half the carbon dioxide emissions as coal. The price of natural gas has plunged as drilling technology has made the United States the world’s leading producer. That has helped drive a wave of fuel-switching at power plants across the United States. Coal generation fell 40% from 2008 to 2017, while natural gas climbed 47%.

Renewable energy is growing quickly, but it still makes up a small portion of the power supply. Wind generated just 6.5% of the nation’s electricity last year. Solar produced 2.2%.

Wind and solar are starting to give fossil fuels serious competition, though. After dramatic cost declines over the last decade, these sources are now significantly cheaper than coal and often cheaper than natural gas, even without subsidies.

They need to replace fossil fuel generation much faster, however, in order to take a serious bite out of emissions.

3. Some good jobs are going away. Dealing with the changes is not easy.

Powering the nation is not the job it used to be. Coal once generated more than half the nation’s electricity. Coal mines and power plants are mostly unionized. The jobs pay well and provide good benefits for workers without a higher education.

Coal mining, however, employs 42% fewer workers than in 2011. More than 300 coal-burning power plants have closed or are slated to be shuttered.

There are growing opportunities in renewable energy and energy efficiency. The solar industry employed 242,000 people in 2018, for example, about 45,000 more than the coal industry.

The jobs are not equivalent. Many solar installation jobs are not unionized, don’t pay as well and have fewer benefits than those for people working at coal plants. And a solar farm doesn’t need many workers once it’s built, while a coal plant can steadily employ hundreds.

Workers hurt by the energy transition are a small part of the overall economy. But coal mines and power plants tend to be in rural areas without much else in the way of industry. When these jobs go away, the pain is localized but intense.

Some policymakers are trying to blunt the impacts. Last year, Colorado was one of several states that passed laws aimed at cutting greenhouse gas emissions and included provisions for a “just transition” — job retraining, economic development aid and other measures to help workers and communities find a life after fossil fuels.

Climate economy
Members of the European Parliament vote in favor of the Paris U.N. COP 21 Climate Change agreement during a voting session at the European Parliament. VOA

4.  No one is doing enough. 

The plunge in coal-fired power helped the United States cut its emissions by an estimated 2.1% in 2018. Since 2005, emissions are down 12.3%.

But the United States pledged to cut greenhouse gases at least 26% by 2025 under the U.N. Paris climate agreement. Emissions must go down by 2.8% per year on average to hit that target. It’s not impossible, experts say, but it’s a stretch.

The Trump administration is moving policy in the opposite direction, aiming to weaken fuel economy standards for vehicles, approving construction of a new oil pipeline from Canada and vowing to shore up America’s coal industry.

Meeting the Paris pledge is not enough, however. Scientists say the world needs to get to zero carbon emissions by 2050 to stave off a climate disaster. Almost no one is on track to do so.

Unless cost-effective carbon capture technology appears soon, natural gas will have to go. Transportation, the largest source of U.S. greenhouse gases, will have to go electric (or hydrogen or biofuel) much, much faster than it is. And someone will have to figure out what to do about emissions from energy-intensive industries like glass, steel, aluminum and concrete.

Also Read- People with Inadequate Food Access Likely to Die Prematurely: Study

Does fighting climate change mean wrecking the economy? Not necessarily. But the steps taken so far will not stop the climate impacts we’re already seeing from becoming much worse.

Can we stop climate change before it’s too late? No one has all the answers yet.

But something must be done. Each new climate-related disaster shows the cost of inaction is mounting.  (VOA)

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What Are Fast Radio Bursts? – Worldatlas.com

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The universe is full of mystery. No matter how much becomes known about the cosmos, there always seems to be more that is unknown. Any time a question is answered, more questions seem to arise, and so the process of scientific discovery becomes never ending. There are many examples of what is unknown about the cosmos, yet one perfect example is a phenomenon known as Fast Radio Bursts (FRB). As the name suggests, an FRB is a burst of radio waves that originate from the depths of interstellar space. They usually only last up to three seconds long, yet whatever releases them emits more energy in one second than our sun does every day. This suggests that FRBs are created by high energy processes, yet exactly what causes them remains unknown. 

Where Do FRBs Come From?

Most FRBs orignate in distant galaxies. Image credit: NASA/ESA

Most FRBs detected originate beyond the Milky Way Galaxy, yet some have been detected within our galaxy. To date, astronomers have detected around 500 FRBs, yet there remains no consensus on what actually creates them. That isn’t to say there aren’t any possible explanations, however. Some popular theories claim that FRBs originate from stellar remnants such as neutron stars or black holes. Other theories posit that they may originate from collisions between black holes or neutron stars. Another interesting theory is that FRBs come from a type of stellar remnant called a magnetar. A magnetar is a type of neutron star that has an exceptionally strong magnetic field and emits high amounts of x-rays and gamma rays, and some FRBs have been traced back to regions around magnetars. It’s quite possible that FRBs form from multiple different events, with no single phenomenon able to explain the origin of every FRB. 

Alien Origin

Galaxy Hubble
Hubble image of a distant galaxy. Image credit: NASA/ESA

Whenever astronomers detect signals of unknown origin, there is always the question of whether or not the signal originated from another civilization. Ever since humans began using technology to transmit signals around the world, some of the signals leak into space and travel at the speed of light. Any civilization that happens to be pointing a radio telescope in the right direction at the right time would detect our signals. Assuming other intelligent civilizations develop radio technology, they too would emit signals out into space that could be detected by us. Thus, some astronomers have wondered if some FRBs are in fact the radio signals from another civilization. Interestingly, this isn’t the first time this has happened. When astronomers discovered the first pulsars, they thought they had come across an alien signal, yet it later turned out to be a rapidly rotating neutron star. In the case of FRBs, it is unlikely they originate from another intelligent species. This is mainly due to the fact that they do not appear to come directly from other solar systems, and the bursts themselves contain so much energy that it seems unlikely a civilization would be creating them. Rather, a natural explanation is more likely, yet it still remains unknown exactly where FRBs come from.

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How Old Is The Sun? – Worldatlas.com

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The sun formed around 4.6-billion years ago, and all the planets formed within the next 100-million years. The age of the sun and the planets is one of the most widely accepted facts about our solar system, and the reason for this is that every line of evidence points to the same age. How is the age of the sun determined?

Finding The Oldest Thing In The Solar System

One way to determine the approximate age of the sun is to find the oldest object in the solar system. Fortunately, there are countless objects that formed along with the sun, such as asteroids, meteors, and planetesimals. These forms of planetary debris remain virtually unchanged for billions of years, and by using radiometric dating methods, scientists can determine their age, in turn directly telling us how old the sun is. Radiometric dating uses precise chemicals to determine the age of rocks, and it works by using something called a half-life. For example, carbon-14 dating is a reliable method for dating things like fossils, as carbon-14 is only present in organic matter. Carbon-14 has a half-life of 5,730 years, meaning that after 5,730 years, half of the carbon-14 will decay into another chemical, in this case, nitrogen-14. Every 5,730 years, another half will decay and so on. By determining the amount of carbon-14 present relative to the amount of nitrogen-14, scientists can determine the age of whatever it is that is being analyzed. While carbon-14 is a reliable method for determining the age of organic matter, it will not work for determining things that are billions of years old. 

To find out when the sun first began to form, astronomers look for iron-60, a rare isotope of iron that is only produced during a supernova explosion. A supernova likely preceded the formation of our solar system, and the energy released from the explosion likely ignited the formation of the sun billions of years ago. Iron-60 has a half-life of 2.26-million years, wherein it decays into nickel-60. Like with carbon-14 and nitrogen-14, astronomers analyze rocks from asteroids and meteors to determine the ratio between iron-60 and nickel-60, which produces an age of around 4.6-billion years. Furthermore, other dating methods used on Earth and the moon have produced ages of around 4.5-billion years, offering further evidence that the sun is at least that old.

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Lifespan Of The Sun

The Sun

The sun is 4.6-billion years old, and astronomers believe that it is only about halfway through its life. We obviously cannot see into the future, and so how do scientists estimate the amount of time the sun will exist for? The process is actually rather simple, and it involves knowing how much fuel the sun has and rate at which it consumes that fuel. Like every other star in the universe, the sun is powered by the nuclear fusion of hydrogen nuclei in its core. When hydrogen is fused together, it produces helium and vast amounts of energy that power the star. So long as nuclear fusion is maintained within the core, the sun will remain a main sequence star. However, that fuel will eventually run out, and when it does, the sun will enter into the final stages of life. By knowing the amount of fuel the sun has and the rate at which it uses that fuel, astronomers estimate that the sun will continue fusing hydrogen in its core for at least another 4 to 5-billion years. When the sun does begin to run out of usable hydrogen, it will evolve into a red giant, eventually blowing off its outer layers. Those outer layers will form a shell of stellar material called a planetary nebula. Meanwhile, the core of the sun will collapse and become a white dwarf. 

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UBC Okanagan study to investigate where Eurasian watermilfoil occurs in lakes – Vernon Morning Star

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A UBC Okanagan pilot project is seeking to better pinpoint and map where the beginnings of Eurasian watermilfoil (EWM) infestation occurs in the large lakes within the Okanagan Valley watershed.

If this pilot project proves successful, it could become a blueprint for other jurisdictions to follow in their own battles with this aquatic plant or other invasive aquatic species, says UBCO assistant professor Mathieu Bourbonnais.

Bourbonnais, with the Irving K. Barber Faculty of Science, is overseeing the project with the assistance of masters graduate student Mackenzie Clarke.

The data modelling prototype is using the technology of topobathymetric lidar, the science of simultaneously measuring and recording three distinct surfaces – land, water and submerged land up to 20 metres below the water surface – using airborne laser-based infrared imagery sensors.

Bourbonnais says being able to better identify potential or small milfoil patches will give better control management tools for the Okanagan Basin Water Board’s Euroasian watermilfoil harvest program, which currently is about an $800,000 a year initiative to try and control the growth and limit the damage of the invasive water plant.

It could also potentially target specific watermilfoil growth sites before they grow out of control near valley lake areas deemed sensitive by Environment Canada for the preservation of the Rocky Mountain Ridge Mussels.

He said EWM has been a formidable invasive aquatic plant species to control since it was introduced into the Okanagan Valley lake system some 40 years ago.

It has also illustrated to the water board the need to be stringent when trying to avoid the Zebra and Quagga mussels from being introduced into the lake system.

Like watermilfoil, there is no solution for removing the mussels once they are introduced into a lake system. It is a rooted submerged plant inhabiting the shallows waters of lakes across North America.

EWM originated from Asia, Europe and Northern Africa and has spread rapidly, introduced in North America from the ballast water of ships or aquarium activities.

Bourbonnais said a lake choked with watermilfoil growth impacts the biodiversity and food webs reliant on the lake habitat, alter the water temperature and impacts its recreational use for swimmers and boaters.

“The impact of invasive species on our lake aquatic systems costs billions of dollars to deal with across the country. It definitely has an impact both ecologically and economically,” he said.

The pilot project fieldwork will be done by early spring, he said, with the hope it provides data upon which to target areas for harvesting leading up to the permit application process next year.

“The goal is the Okanagan Basin Water Board can take the data generated from this research model and liaise with the province and federal government on how to go forward,” he said.

“We hope it can help the management strategy of where to send the lake rototillers to pull up the plants.”

READ MORE: Milfoil infestation continues to plague Okanagan watershed

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