Green light: Obama on oil, whaling whistleblower and Calvin Klein-loving jaguars

BP oil spill • Barack Obama uses Oval Office speech to lay out battle plan for BP oil spill • We could not have stopped Gulf oil gusher, ExxonMobil chief tells Congress • US Congress to tell BP boss: you broke rules, cut costs and it ended in disaster • Gulf oil spill: Experts disagree on kindest way to deal with oiled-up birds • BP survival fears as predicted cost of oil spill soars With warnings the leak could continue until Christmas , Obama this week attempted to assert his authority with a surprisingly flat Oval Office speech . Conservation • Whistleblower aims to expose dark side of Japanese whaling • White-tailed eagle reintroduction plan falls victim to spending cuts • Asian wild ass conservation points to brighter future for Tibetan plateau wildlife • US schoolgirl helps to raise $100,000 for oil spill charities • Snakes declining at alarming rate, say scientists Bad news for snakes and sea eagles this week, but there are signs of hope for wildlife on the roof of the world, blogs Jonathan Watts . Multimedia • In pictures:The growing onslaught of public anger over BP's oil spill • In pictures: The best of pond life • Video: Pelicans in the Gulf of Mexico enveloped by the Deepwater oil spill • Video: We will make BP pay, vows Obama • In pictures: The week in wildlife The latest from the Gulf - plus Guardian readers' photos of pond life , from waterlilies to water boatmen. Green living • Boris Johnson should learn the bike rules of the road in Bogota • Travel without money poses challenges that make holidays more fun • Can I buy margarine that is palm oil-free? • Waterproof jackets may help you soak in the view, but can cost the Earth • Should I trade in my old television for a new one? Catch up with the latest post from our Moneyless Man series , and join Leo Hickman in this week's debate on palm oil . Best of the web • UN considers review of alleged carbon offset abuses • Police to pay compensation to Kingsnorth climate camp protesters • BP spill gives Obama an opportunity to reform oil For more of the best environment comment and news from around the web, visit the Guardian Environment Network . ...And finally • Jaguars obsessed with Calvin Klein scent Obsession for Men proves to be an obsession for wild cats too