DR. SAUL GRIFFITH
is founder and principal
scientist at Otherlab, an
independent R&D lab,
where he focuses on
engineering solutions for a clean energy,
net-zero carbon economy. Occasionally
making some pretty cool robots too. Saul
got his PhD from MIT, and is a founder
or co-founder of makanipower.com,
sunfolding.com, voluteinc.com, treau.cool,
departmentof.energy, materialcomforts.
com, howtoons.com, and more. Saul was
named a MacArthur Fellow in 2007.
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I’m a scientist, engineer, inventor, and father
who is passionate about my kids being able
to live in a clean world and feel the sense of
awe in nature that I’ve been lucky to enjoy.
I’m in this fight with all I’ve got, including a lot of
data that convinces me that it’s rational to have
hope — that we can win big against this climate
emergency.
And if we win — when we win, because there is
no other option — we’ll be much better off than
before. When we replace fossil fuels with clean
electricity, we’ll not only have a better future for
our kids, we’ll create new jobs and remain the
economic powerhouse that we are today.
Billionaires might dream of escaping to Mars.
The rest of us, frankly, have to stay and fight.
It’s a climate emergency. Break the glass.
What’s the Clean Energy
Infrastructure We Need?
In short, to electrify everything, we’ll need about
three times the amount of electricity that we
currently produce.
Today, the U.S. grid delivers 450GW (gigawatts)
of electricity. If we electrify nearly everything,
we’ll need about 1500GW, or 1.5TW (terawatts).
That’s a lot. That means on this path to
decarbonization we’ll need more than 3 times as
much electricity. How do we get there?
Today we can produce electricity at remarkably
low costs, but the costs of distributing that
electricity remain high. In the U.S., the average
cost of grid electricity is 13 cents per kilowatt-
hour (¢/kWh). Amazingly, more than half of this
is the cost of transmission and distribution:
7.8¢/kWh. In contrast, rooftop solar in Australia
provides electricity to the customer at just 6–7¢/
kWh total.
That should seem shocking, and let’s reflect
upon it for a moment. Locally generated
electricity, because it nearly eliminates
transmission and distribution costs, will likely
always be less expensive than any centrally
generated power source. The cheapest energy
in the future will likely come from your solar
roof, and we should generate as much of it as
possible. In addition to homes we should look to
the roofs of commercial buildings and solar cells
over parking lots to increase the local generation
capacity and keep our costs as low as possible.
The total amount of electricity we need,
however, is more than can fit on all of our
rooftops and parking spaces.So we’ll also
need a significantly expanded electrical grid to
supplement local generation with electricity
generated in large centralized facilities.It will
supply electricity to places that need it from
other places where the sun is shining or the
wind is blowing or the reactors are reacting. It
will have microgrids and household grids and
neighborhood grids and a giant grid to connect
them all together.This “energy internet” will
keep transmission and distribution costs as low
as possible while balancing supply and demand.
The exact details will vary geographically: by
local population density (urban vs. suburban
vs. rural), by climatic region (hot vs. cold vs.
temperate), and by resource availability (sunny
vs. windy vs. soggy places that can generate
hydroelectricity). Places with lower density,
mild climates, and good solar resources (like
Australia, California, New Mexico, and Texas) can
almost completely solve the challenge with well-
managed solar alone.
Multi-story dwellers in New England, however,
have too small a roof and too cold a winter for this
solution. High-density populations (in any climate)
will probably need to lean more heavily on nuclear
power or some other imported energy, which
could be long-distance electricity transmission,
renewably generated hydrogen, or biofuels.
In any case, the fastest, most easily scalable
way to zero emissions is through electrification.
To solve the climate emergency, we need to get
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