Green light: Spring, solar boats and urinals in the home

Spring and wildlife • Severe winter delays bluebell season • The great spring gamble: nature's winners and losers • Britain 'blooming earlier thanks to rising temperatures' • Q&A: Biodiversity With spring finally here, Steven Morris and Stephen Moss look at which species are blooming and which, like the bluebell, are delayed. And if you've ever wondered what the frequently used phrase 'biodiversity' actually means, read our in-depth Q&A . Green technology • Tokyo to trial electric 'filling stations' to boost green transport • Solar-powered boat Türanor raises hopes of a sun-fuelled future • Renault ad taken off air over misleading emissions claim • Mobile phone barcode app to help ethical shoppers Mass market electric cars took a step closer this week with the first public trial of Better Place's battery-swapping system in Japan . Solar power, meanwhile, enjoyed its moment in the sun as the maiden voyage of the world's largest solar boat was christened . Green living • Aviation Q&A: the impact of flying on the environment • Ask Leo: Why don't we use urinals in the home? • The Osijco moment: A crisis that all cyclists must face • Sandy Sullivan's innovation: an eco alternative to burial and cremation This week Leo Hickman answered one of today's pressing environment questions: why don't we use water-saving urinals at home ? Guardian readers weighed in with thoughts from the instructive to the ridiculous. Multimedia • In pictures: The week in wildlife • In pictures: Satellite eye on Earth: March 2010 • Audio: How YouTube is converting climate sceptics • In pictures: Europe's wild wonders • In pictures: The world's biggest solar-powered boat Best of the web • BusinessGreen: Are we set for a green election? • Grist: We need birth control, not geoengineering • IPS: Eastern Europe lagging on waste and recycling, NGOs warn • BusinessGreen: Carbon edges up as EU confirms emissions fell 11% last year For more of the best environment comment and news from around the web, visit the Guardian Environment Network . ...And finally • Snakes in the grass: Florida declares open season on Everglades intruders Forget Snakes on the Plane - the sunshine state is preparing for its first-ever open hunting season on pythons as efforts to control numbers falter