Green news roundup: Nuclear debate, spring sightings and iconic bike designs

Climate and energy • Japan nuclear crisis puts UK public off new power stations • Budget 2011: The key green announcements to watch for • Safety breaches reported at UK nuclear reactors • UK government unveils plans to slash solar feed-in tariffs Wildlife and conservation • Spring is here, say UK nature watchers • Shipwreck threatens penguin colony on South Atlantic island • Lord Clark: Independent panel for conserving forests doesn't look very public • Essex reptiles settle into new Wiltshire home Multimedia • Iconic bicycle designs through the ages – in pictures • The week in wildlife - in pictures • Lammas: The eco-village that lives off the grid - video • Yann Arthus-Bertrand: Looking down on creation Green living • Throwing food away sends world's scarce water gushing down the plughole • What's the greenest way to feed the birds? • Danny Carnegie's innovation: setting up UK Aware • A small town in Germany where recycling pays ... And finally • Is 'Climate Week' inspirational or hypocritical? A business-backed week of low-carbon events and awards will celebrate practical action on climate change. But does the sponsorship by RBS taint the event?