Local news is at the top this week, from water chestnut removal to bike sharing to the Boston Green Fest.

• Water chestnut removal from Mystic River to commence – Somerville Journal. There are quite a lot of water chestnuts in the Charles River, too, and they’re sharp little buggers.
• Hubway Discounts! – Boston Biker. The bike sharing program is offering a reduced yearly fee and a free helmet for low-income Boston residents.
• Boston GreenFest 2011: Green Gone Bad – Boston Green Scene. I didn’t make it to GreenFest this year, but I’ve been disappointed by it in the past. The Boston Local Food Festival is much better.
• Can Jeremy Grantham Profit From Ecological Mayhem? – New York Times. This is some seriously long-term investment strategy. I think I have a crush on Jeremy Grantham.
• Will new insurance coverage make the intrauterine device America’s favorite contraceptive? – Slate. Great news: by 2013, insurance companies will have to provide IUDs (and other contraceptives) without a copay.
• Fresh and Direct From the Garden an Ocean Away – New York Times. This is why I’m always a little confused by a knee-jerk reaction against nonnative species: tomatoes aren’t native to Italy, and potatoes aren’t native to Ireland.
• Is taking notes on a notepad or an iPad more environmentally responsible? – Slate. Hint: it’s not the iPad.