There Are 68.4 Million Better Places for Solar Panels Than Mr. Trump's Wall
By John Rogers
President Trump on Tuesday suggested putting solar panels on his infamous border wall to help pay for it (since Mexico certainly won't). While there are more things wrong with that proposal than I can cover in this space, it's great to see that President Trump has finally figured out solar panels are cost-effective energy investments, paying for themselves even if you ignore the many environmental benefits. But here are more than 68.4 million better places for President Trump to invest in solar to pay dividends for the American people.
Solar on the roof
The U.S. National Renewable Energy Laboratory (NREL) last year published a fine study of the potential of America's rooftops to host solar. The researchers analyzed how much solar photovoltaic (PV) capacity we could get overhead, from existing buildings (considering roof orientation, tilt and shading), and calculated what it would add up to.
One conclusion of that analysis was that "83 percent of small buildings have a suitable PV installation location," and that more than a quarter of the total roof area of those buildings could work. NREL is careful to say that that's the technical potential, not necessarily what would make sense in other regards. But if we take that 83 percent, and consider the number of stand-alone, single-family houses, you end up with 68,380,764 million (give or take a few million) places to put solar.
As it happens, a lot of those sunny rooftops are near our beautiful southern border: In most Texas zip codes, for example, more than 90 percent of the small buildings might work for solar.
Source: Gagnon et al. 2016
From a technical potential point of view, residential rooftops across the country could meet a big chunk of household electricity needs in a lot of states: More than 90 percent in a dozen states, and at least 70 percent in 27 states.
Source: Gagnon et al. 2016
Solar on more roofs
But wait, there's still more: Note that NREL's "small buildings" doesn't just mean detached single-family homes. If we add in duplexes and small apartment buildings, that would mean millions more rooftops for solarizing.
And then there's plenty of roof space beyond small buildings: commercial, industrial and institutional roofs. NREL found that "more than 99 percent of large and medium buildings" have some place that would work for solar ("at least one qualifying roof plane"). And the total rooftop area that would work is much higher than for small buildings (very few trees shading the middle of a big-box store roof…). Their calculations suggest potential on around half of the total roof area of medium buildings, and two-thirds of large ones.
If you take the rooftop potential across the various size buildings (which, unlike walls in the middle of deserts, are already connected to the electricity grid), and compare it even to the total electricity needs in each state, you find that it really adds up (particularly in states and cities that are serious about energy efficiency).
Source: Gagnon et al. 2016
Solar on the ground
Plus, roofs are definitely not the only place suitable for solar. The latest solar stats show that the progress of large-scale solar, done by utilities and others, has been even more impressive than residential and commercial ("non-residential").
Source: GTM-SEIA Solar Market Insight, 2016 Year in Review
And large, ground-mounted solar arrays don't just make sense in fields, farmlands and deserts. Old landfills or "brownfields"—lands that have been degraded by past industrial activity—can be a great fit for new solar capacity. (The same could be true for solar at old power plant sites, where the plants have shut down but the infrastructure and grid connection are still there.)
Larger arrays can also be the foundation of community solar systems, a way of making solar work for people who can't or don't want to do it on the roof.
Solar in reality
So enough of the frivolous flights of folly in trying to use solar's overwhelming popularity to make a wildly unpopular project slightly less unpopular. A border wall might need solar, but solar certainly doesn't need a border wall.
Solar is real, and it makes sense. And we already have plenty of places to put it, if President Trump would just put his office and budget to good use for moving American energy forward.
John Rogers is a senior energy analyst with expertise in renewable energy and energy efficiency technologies and policies at the Union of Concerned Scientists.
By Itai Vardi
A recent intensification in protests against Williams Partners' planned Atlantic Sunrise pipeline in Pennsylvania prompted a state senator to propose legislation aimed at limiting demonstrations.
Last month, Pennsylvania Sen. Scott Martin (R-Norman) announced his intention to introduce legislation that would pass the costs of law enforcement responding to protests onto the demonstrators. Martin also helped introduce a different bill that would criminalize protests at natural gas facilities.
The so-called "first and last mile" problem is one of the biggest hurdles with public transportation. How do you encourage more people to take Earth-friendlier commutes when their homes are miles away from the train or bus station?
One solution, as this Estonian electric scooter company proposes, is to simply take your commute with you—literally. Tallinn-based Stigo has developed a compact e-scooter that folds to the size of a rolling suitcase in about two seconds.
[Editor's note: I'm still in shock after hearing the news that Lucia Grenna passed away in her sleep last week. When we first met in April of 2014 at a Copenhagen hotel, I was immediately taken by here powerful presence. We spent the next couple days participating in a Sustainia climate change event where Lucia presented her audacious plans to connect people to the climate issue. I had the chance to partner with Lucia on several other projects throughout the years and work with her incredible Connect4Climate team. I was always in awe of her ability to "make the impossible possible." Her spirit will live on forever. — Stefanie Spear]
It is with a heavy heart that Connect4Climate announces the passing of its founder and leading light, Lucia Grenna. Lucia passed peacefully in her sleep on June 15, well before her time. We remember her for her leadership and extraordinary ability to motivate people to take on some of the greatest challenges of our time, not least climate change.
By Stacy Malkan
Neil deGrasse Tyson has inspired millions of people to care about science and imagine themselves as participants in the scientific process. What a hopeful sign it is to see young girls wearing t-shirts emblazoned with the words, "Forget princess, I want to be an astrophysicist."
As Trevor Noah noted during The Daily Show episode last night (starts at 2:25), the real reason Trump has these rallies is to "get back in front of his loyal crowds and feed of their energy." Noah believes that "Trump supporters are so on board with their dude he can say anything and they'll come along for the ride."
By Katie O'Reilly
Two years ago—long before coal became one of the most dominant and controversial symbols of the 2016 presidential election—Bloomberg Philanthropies approached production company RadicalMedia with the idea of creating a documentary exploring the U.S. coal mining industry. Last spring, they brought on Emmy-nominated director Michael Bonfiglio, tasked with forging a compelling story out of the multitudes of facts, statistics and narratives underlying the declining industry.