Tag Archives: environment

How Cheap Can Electric Vehicles Get?

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 … Continue reading

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Why I’m Starting the First AngelList Cleantech Syndicate

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 … Continue reading

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Citizens Led on Gay Marriage and Pot. We Can on Climate Change Too.

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 … Continue reading

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What’s the EROI of Solar?

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 – … Continue reading

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How Much Land Would it Take to Power the US via Solar?

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 … Continue reading

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2014 Was a Good Year: Better Than You Remember

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 … Continue reading

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What’s Limiting the Impact of GMOs on Global Food Security?

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 … Continue reading

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Arctic Sea Ice: Less in November 2013 than Summers Before 2006

(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 … Continue reading

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Less Water, Less Oil

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 … Continue reading

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Do We Eat Oil? Farms Are More Energy Efficient Than Ever

A common refrain one hears about modern farming in the US is that it's too energy intensive.  However, data from the USDA shows that US farms use only half as much energy per unit of farm output as they did … Continue reading

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