Wind Power Blowing More Reliably Than Ever
17 Aug, 2016
New wind turbines produce power more steadily – with less up and down intermittency – than ever before. As I wrote in August of last year, NREL believes that next-generation wind turbines can reach a capacity factor of 60%. That is up from a capacity…
R e a d M o r eHow Cheap Can Electric Vehicles Get?
12 Apr, 2016
This is part 5 of a series looking at the economic trends of new energy technologies. Part 1 looked at how cheap solar can get (very cheap indeed). Part 2 looked at the declining cost and rising reliability of wind power. Part 3 looked at…
R e a d M o r eWhy I’m Starting the First AngelList Cleantech Syndicate
22 Feb, 2016
I’ve been writing and speaking about the incredible pace of solar, wind, and storage for years. I’ve been quietly investing in startups in that space as well. Today I’m taking a new step: I’m launching an AngelList Syndicate specifically focused on investing in clean energy…
R e a d M o r eCitizens Led on Gay Marriage and Pot. We Can on Climate Change Too.
15 Jul, 2015
A decade ago, it was nearly inconceivable that in 2015, gay marriage would be legal across the US and marijuana fully legal in four states plus the District of Columbia. Yet it happened. It happened because citizens who wanted change led, from the bottom up,…
R e a d M o r eWhat’s the EROI of Solar?
4 Jun, 2015
There’s a graph making rounds lately showing the comparative EROIs of different electricity production methods. (EROI is Energy Return On Investment – how much energy we get back if we spend 1 unit of energy. For solar this means – how much more energy does…
R e a d M o r eHow Much Land Would it Take to Power the US via Solar?
8 Apr, 2015
I’ve seen some pieces in the media lately questioning this, so allow me to point to some facts based on real-world data. tl;dr: We’ll probably never power the world entirely on solar, but if we did, it would take a rather small fraction of the…
R e a d M o r e2014 Was a Good Year: Better Than You Remember
21 Dec, 2014
Eric Garner. Michael Brown. The Sony hack and surrender to fear. 2014 seems to be ending on a crappy note. My twitter feed is full of people expressing good riddance to the year. 2014 was better than that. I want to take a moment to…
R e a d M o r eWhat’s Limiting the Impact of GMOs on Global Food Security?
26 Feb, 2014
My friend Jon Foley, who I have a great deal of respect for, has a piece up arguing that GMOs have failed to improve global food security because they fall into a trap of reductionist thinking. With due respect to Jon, I see this a…
R e a d M o r eArctic Sea Ice: Less in November 2013 than Summers Before 2006
26 Dec, 2013
(This is a correction of a previous post that stated that there was less Arctic sea ice in December than in any summer before 2007. That post used a PIOMAS anamoly graph, which was not appropriate.) The Arctic is melting. That's a problem. Ice reflects 90% of…
R e a d M o r eLess Water, Less Oil
14 Nov, 2013
Here in the US, we consume less oil per person and less water per person than we have in decades. Oil consumption per person per year, from the IEA. (The last bullet point is their projection for 2030): Water withdrawals per person, from the Pacific…
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