Craft beer

I have a problem.

I know I won't get any sympathy, but still.

On any given night, I can walk out my front door and within a half hour be at one of seven different taprooms serving up amazing fresh beer, brewed on the spot. Do you get what I'm going through? How could anyone possibly choose?

Here in the leafy western suburbs of Boston, there's Start Line in Hopkinton; CraftRoots in Milford; 7^th Wave in Medfield; Medusa in Hudson; and Jack's Abbey, Springdale and Exhibit 'A' in Framingham.

You may not be aware that Ballast Point Brewing Company, famed for its Sculpin IPA and fruity renditions of the same beer, was bought in 2015 for $1 billion by Constellation Brands, the company that owns Corona. Or that Lagunitas Brewing Company is now owned fully by Heineken or that Goose Island has since 2011 been a brand of Anheuser-Busch InBev, the global brewing giant that owns Budweiser.

If you're tuned into the world of beer, you may be aware of sour beers — a loosely defined style that has been made for centuries but is gaining fresh appreciation in today's craft beer renaissance. Brewers make these beers by deliberately adding bacteria and, sometimes, wild yeast to the brew, then letting them age slowly. It sounds weird, but sours can be delicious — tart and earthy, and redolent of things like leather, fruit and wood.

When you hear the words "green brewery," you might picture gleaming solar panels or aerodynamic wind turbines. But the most valuable piece of technology at the $24 million headquarters of Smuttynose Brewing Co. on the seacoast of New Hampshire isn't quite as sexy.

"The place you have to start is the building envelope," says Smuttynose founder Peter Egelston.