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A Green New Deal must not sabotage climate goals

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This story was originally published by the Bulletin and is reproduced here as part of the Climate Desk collaboration.

Recently, 626 organizations — mostly environmental groups, including 350.org and Greenpeace USA — sent a letter to Congress urging lawmakers to consider a number of principles when crafting climate legislation like a Green New Deal “to keep global warming below 1.5 degrees C (2.7 degrees F).” Broadly, there were six major principles in the letter: Halt all fossil fuel leasing, phase out all fossil fuel extraction, end fossil fuel and other dirty energy subsidies; transition power generation to 100 percent renewable energy; expand public transportation and phase out fossil-fuel vehicles; harness the full power of the Clean Air Act; ensure a just transition led by impacted communities and workers; and uphold indigenous rights.

These are generally wise goals, but some concerns about the details caused eight major environmental groups — including the Sierra Club, the Natural Resources Defense Council, and the Environmental Defense Fund — to decline to sign the letter. As one national environmental group spokesperson put it, “the details matter … There is some language that gave us some concern.”

To meet climate targets, we need every tool in the chest. Meeting the Paris climate agreement targets of limiting global warming to less than 1.5 degrees C (2.7 degrees F) of global warming above pre-industrial temperatures — or even a more dangerous but more feasible 2 degrees C (3.6 degrees F) — would require massive and immediate global action to reduce fossil fuel consumption and carbon pollution. Simply put, we’ve already burned through so much of our carbon budget that meeting those targets would take everything we’ve got. (We’ve already locked ourselves in to close to 1.5 degrees C of warming, just based on greenhouse gas emissions to date.)

But the letter includes language that rules out some zero-carbon technologies. For example, it states, “in addition to excluding fossil fuels, any definition of renewable energy must also exclude all combustion-based power generation, nuclear, biomass energy, large scale hydro and waste-to-energy technologies. To achieve this, the United States must shift to 100 percent renewable power generation by 2035 or earlier.”

The listed energy sources all have pros and cons, and groups concerned about their non-climate environmental impacts could certainly make the case for eventually phasing out each one. But the United States currently gets about 32 percent of its electricity generation from natural gas, 30 percent from coal, 20 percent from nuclear, 7 percent from hydroelectricity, 6 percent from wind, and 1 percent from solar, in round numbers. (The remaining few percent come from miscellaneous energy sources such as geothermal, landfill gas, wood, and others.) Were nuclear and hydroelectric power to be eliminated as energy sources at the same time as all fossil fuels, that means that the United States would have to replace its top four electricity sources (nearly 90 percent of its supply) within about 15 years.

Simply replacing all forms of fossil fuels alone (63 percent of the supply) with zero-carbon technologies within this short timeframe would already be an immense task. And the figures here are strictly referring to what it is required for electricity generation in the United States; they don’t even account for other voracious energy-consuming sectors like transportation — which bring the fossil-fuel share of the U.S. economy up to 80 percent, plus another 9 percent from nuclear and 7 percent from hydroelectric power and biomass. Why make the already gargantuan task so much more difficult?

Germany provides a cautionary tale for environmental groups. The country implemented what it called an “Energiewende” (energy transition) strategy that prioritized the phase-out of nuclear power over replacing fossil fuels, despite its goal of achieving a low-carbon energy supply. For example, in the year 2000, 50 percent of Germany’s electricity was supplied by coal compared to 29 percent from nuclear power and 7 percent from renewables. In 2015, the share was 46 percent coal, 15 percent nuclear, and 33 percent renewables. In other words, the country’s coal consumption has remained nearly unchanged since the turn of the century — from 50 percent coal to 46 percent coal. Instead, Germany’s rapid deployment of renewable energy has primarily replaced its nuclear power plants.

There are certainly legitimate objections to nuclear power, but it is nevertheless a zero-carbon energy source. If we consider climate change an urgent, existential threat and if we want to meet the Paris climate targets, then eliminating fossil fuels must be our first priority. Only after fossil fuels have been replaced can we consider doing the same to other zero-carbon energy sources.

Market-based solutions can be effective. Along similar lines, the letter states: “We will vigorously oppose any legislation that … promotes corporate schemes that place profits over community burdens and benefits, including market-based mechanisms and technology options such as carbon and emissions trading and offsets, carbon capture and storage, nuclear power, waste-to-energy and biomass energy.”

The letter seems to envision that the needed carbon pollution cuts will be achieved purely through government regulations rather than market-based mechanisms such as a carbon tax or a cap-and-trade system. But it’s unclear why that must necessarily be our approach. Putting a price on carbon pollution is a logical way to incorporate its costs into fuel and energy prices, and 45 top economists across the political spectrum recently endorsed a carbon tax. And rebating the taxed revenue via regular dividend checks is a progressive measure that would benefit lower income communities.

One concern may be that a market-based system pricing carbon pollution would benefit zero-carbon energy technologies that some letter signatories oppose — such as nuclear, hydroelectric, biomass, and fossil fuels using carbon capture and storage. There are environmental reasons to oppose some of these technologies; for example, other harmful pollution from fossil fuels and the disposal of hazardous nuclear waste present very real problems.

But the letter’s stated primary goal is to meet the Paris climate targets, and we’ll fail if we tie our hands behind our backs by ruling out zero-carbon technologies and market-based policy tools. Phasing out nuclear, hydroelectric, and biomass energy should only be considered after fossil fuels have been eliminated. Pricing carbon pollution certainly shouldn’t be ruled out (and in fact should be pursued vigorously), and even carbon capture and sequestration should remain on the table.

If we consider climate change an urgent existential threat that justifies the Paris climate targets, then at the very least phasing out fossil fuels and carbon pollution must be our top priority when crafting climate policy. Other concerns that undermine zero-carbon energy sources must be secondary, lest we sabotage our own climate-preserving efforts.

Dana Nuccitelli is an environmental scientist, and author of Climatology versus Pseudoscience. He has published 10 papers related to climate change in peer-reviewed journals, including three studies on the expert climate consensus.

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A Green New Deal must not sabotage climate goals

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Trump administration’s climate report raises new questions about nuclear energy’s future

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This story was originally published by the HuffPost and is reproduced here as part of the Climate Desk collaboration.

Call it the nuclear power industry’s thirst trap.

The United States’ aging fleet of nuclear reactors ― responsible for one-fifth of the country’s electricity and most of its low-carbon power ― has never been more necessary as policymakers scramble to shrink planet-warming emissions. Yet the plants are struggling to stay afloat, with six stations shut down in the last five years and an additional 16 reactors scheduled to close over the next decade. So far, new coal- and gas-burning facilities are replacing them.

The nuclear industry blames high maintenance costs, competition from cheaper alternatives and hostile regulators concerned about radiation disasters like the 2012 Fukushima meltdown in Japan. But the country’s most water-intensive source of electricity faces what could be an even bigger problem as climate change increases the risk of drought and taxes already crumbling water infrastructure.

That finding, highlighted in the landmark climate change report that the Trump administration released with apparent reluctance last Friday, illustrates the complex and at times paradoxical realities of anthropogenic, or human-caused, warming. It also stokes an already hot debate over the role nuclear energy should play in fighting global warming, a month after United Nations scientists warned that carbon dioxide emissions must be halved in the next 12 years to avoid cataclysmic climate change leading to at least $54 trillion in damage.

The report ― the second installment of the Fourth National Climate Assessment, a congressionally mandated update on the causes and effects of anthropogenic warming from 13 federal agencies ― devoted its entire third chapter to water contamination and depletion. Aging, deteriorating infrastructure means “water systems face considerable risk even without anticipated future climate changes,” the report states. But warming-linked droughts and drastic changes in seasonal precipitation “will add to the stress on water supplies and adversely impact water supply.”

Nearly every sector of the economy is susceptible to water system changes. And utilities are particularly at risk. In the fourth chapter, the report’s roughly 300 authors conclude, “Most U.S. power plants … rely on a steady supply of water for cooling, and operations are expected to be affected by changes in water availability and temperature increases.”

For nuclear plants, that warning is particularly grave. Reactors require 720 gallons of water per megawatt-hour of electricity they produce, according to data from the National Energy Technology Laboratory in West Virginia cited in 2012 by the magazine New Scientist. That compares with the roughly 500 gallons coal requires and 190 gallons natural gas needs to produce the same amount of electricity. Solar plants, by contrast, use approximately 20 gallons per megawatt-hour, mostly for cleaning equipment, according to the Solar Energy Industries Association, a trade group.

Nuclear plants are already vulnerable to drought. Federal regulations require plants to shut down if water in the river or lake that feeds its cooling drops below a certain level. By the end of the 2012 North American heat wave, nuclear generation fell to its lowest point in a decade, with plants operating at only 93 percent of capacity.

The availability of water is one problem, particularly for the majority of U.S. nuclear plants located far from the coasts and dependent on freshwater. Another is the temperature of the water that’s available.

Nearly half the nuclear plants in the U.S. use once-through cooling systems, meaning they draw water from a local source, cool their reactors, then discharge the warmed water into another part of the river, lake, aquifer, or ocean. Environmental regulations bar plants from releasing used water back into nature above certain temperatures. In recent years, regulators in states like New York and California rejected plant operators’ requests to pull more water from local rivers, essentially mandating the installation of costly closed-loop systems that cool and reuse cooling water.

In 2012, Connecticut’s lone nuclear power plant shut down one of its two units because the seawater used to cool the plant was too warm. The heat wave that struck Europe this summer forced utilities to scale back electricity production at nuclear plants in Finland, Germany, Sweden, and Switzerland. In France, the utility EDF shut down four reactors in one day.

“Already they’re having trouble competing against natural gas and renewable energy,” said John Rogers, a senior energy analyst at the Union of Concerned Scientists. “Add onto that high water temperatures, high air temperatures and drought. It’s just another challenge.”

But water has yet to pose an existential crisis. The U.S. Nuclear Regulatory Commission said that it considers climate change when reviewing applications for nuclear plants’ construction or operation permits and that it has never rejected one over concerns about dwindling cooling water resources.

“For plants on lakes and rivers, the basic consideration will continue to be whether or not the water level in that body is high enough to meet the conditions of the license,” said Scott Burnell, a spokesman for the Nuclear Regulatory Commission. “To this point, there have been no indications in the NRC’s analyses to suggest that plants would have to deal with the potential for the water bodies to no longer be able to fulfill their function.”

If or when that situation arises, a plant would have to propose a plan to maintain the requirements of the license, likely by reducing water intake and cutting electricity production, he said.

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There are ways to make nuclear plants more efficient with water. Closed-loop systems already cool 40 percent of the country’s reactors. For more than a decade, regulators and industry players have been discussing the feasibility of air-cooled condensers, which use electricity generated by the plant to power air conditioners that cool reactors without water. But the technology siphons roughly 7 percent of the power produced by the plant and has yet to be installed at any U.S. nuclear station, according to the industry-funded Nuclear Energy Institute.

Another approach is to use recycled water. To cool its three reactors, the Palo Verde nuclear plant in Arizona sources most of the 20,000 gallons it uses per minute from reclaimed sewage from a treatment plant near Phoenix — a technique hailed in 2016 as “a feat of engineering” amid a drought.

Breakthroughs like that could make nuclear an attractive option for powering solutions to water scarcity in the years to come, such as desalinating brackish or saltwater and moving it to drought-parched regions.

“That’s energy intensive,” said Matt Wald, a spokesman for the Nuclear Energy Institute. “If you want to do that without adding carbon emissions, you’re likely to look at nuclear power as a way to do that.”

That, however, gets to the heart of the biggest question looming over the nuclear industry: Is it, given the radioactive waste it produces, clean energy?

For the growing number of states and municipalities pledging to use 100 percent renewable energy by the middle of the century, the answer is maybe.

Hawaii became the first state to adopt a 100 percent renewable electricity rule in 2015, pledging to quit gas and coal by 2045. The law makes no mention of nuclear, probably because the archipelago state has no reactors and requires a minimum two-thirds vote from both houses of the legislature to approve the construction of a nuclear plant or radioactive waste site.

The 100 percent clean electricity bill that California passed in August mandates that the state generate 60 percent of its electricity from renewables like wind and solar by 2030. But it gives regulators another 15 years after that to complete the overhaul with energy sources considered nonrenewable, including nuclear power, large hydropower dams, and gas-fired power plants that capture and store emissions.

statute that Atlanta passed in June to get the city to 100 percent clean electricity by 2035 is vague, listing nuclear as a source of clean energy but vowing to get all its power from renewables.

For the Sierra Club, the environmental giant making a huge push to get cities and states to go all renewable, nuclear power is “a uniquely dangerous energy technology for humanity” and “no solution to climate change.”

“There’s no reason to keep throwing good money after bad on nuclear energy,” Lauren Lantry, a Sierra Club spokeswoman, said by email. “It’s clear that every dollar spent on nuclear is one less dollar spent on truly safe, affordable, and renewable energy sources like wind, solar, energy efficiency, battery storage, and smart grid technology.”

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Trump administration’s climate report raises new questions about nuclear energy’s future

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