In case you missed the rip-roaring speech of the world’s most charismatic environmentalist at Live Earth, here's Bobby Kennedy again!

It's not quite the Amazon rainforest, but Britain's tree canopy is a vital asset. Lucy Siegle on why, and how, we should protect it.

 In the popular imagination, big trees equal trouble. Among the plethora of problems they supposedly cause is the downright irresponsible shedding of fruit (Islington council has taken umbrage at dangerous pear trees) and conkers (Norwich council found the conker-dropping antics of 20 horse chestnuts intolerable), and leaves that make pavements slippery.

From B&Bs to Boeing, everyone is jumping on the environmental bandwagon - but how can we be sure that what they promise is what they deliver?

Tom Robbins reports

If you are looking for an ethical, environment-friendly holiday, it seems like the perfect place to start. Responsible Travel promises 'hand-picked holidays from hundreds of specialist operators who care about the environment and local people'. The company is by far the most successful of its kind and has unimpeachable eco-credentials to match - one of the founders was professor of responsible tourism management at Leeds Metropolitan University, early backing came from The Body Shop's Anita Roddick and it organises the high-profile Responsible Tourism Awards. 

You’ll do yourself and the planet a favour, writes Tom Hodgkinson, a keen advocate of the Lying Around in Fields Society

Lying around in fields seems to me to be an eminently practical and enjoyable way to promote your chosen issue, whether it be peak oil or climate change, because by lying around in fields you are doing no harm whatsoever to the planet.

While love may conquer all, it won't survive an in-depth interrogation about a partner's recycling habits on the first date advises Anna Shepherd

Once you've been together a few years (in my case make that eight) you reach a point in your relationship when you can happily hurl abuse at your loved one if he (or she) so much as leaves the tap on a for a moment longer than is necessary to rinse a plate or dampen a toothbrush. By then, the extent of your eco-fascism will have been revealed. But at the beginning, my advice would be to take it slow.

The day I sold my car was one of the most liberating of my life says Julia Stephenson