This week, Nick’s letter is about his speech to the Green Alliance. It summarises what he said, but doesn’ t link to it. Just as well we put it in full here, then. The aim is to drive people to shiny new “Why I am Green” Nationbuilder site. 1329 people have already given their reasons. He’s losing no opportunity to explain why Ed Miliband’s energy price freeze just doesn’t cut it. He’s modified the language a bit, putting in a bit more detail, but is still describing it as the con that it is.

Nick Clegg made an important speech to the Green Alliance this morning, making the case that what seemed like a cross-party consensus on the issue of climate change has now crumbled, leaving the Liberal Democrats as the only major party still committed to preventing the catastrophic warming of the planet:

Labour have undermined what was their one and only green pledge – a decarbonisation target – with a policy that would damage the very industry needed to deliver it. They’re abandoning the environment to score a few populist points. It’s utterly Janus-faced.

Senior members of the Conservative party now openly attack environmental policies as anti-growth, as well as publically question the threat of climate change.

And yet all of us sat to hear Sir Mark Walport, the Government’s Chief Scientific Advisor, when he came last month and explained to the Government that the recent IPCC report – which made clear the threats posed by man-made climate change – was the most exhaustive, authoritative, peer reviewed report on climate change ever published. How much more hard science is needed to convince the climate change deniers they’ve got it wrong?

The speech also touched on some other, less well-publicised, areas within environmental policy:

In our natural environment, we’ve introduced a presumption in favour of sustainable development, and maintained strong protections for the Green Belt and Areas of Outstanding Natural Beauty. Something many of the people in this room were involved in.

We’re on track to plant a million more trees by the end of the parliament – the majority in the most deprived and least green areas.

After a comprehensive review, we plan to launch a new National Pollinator strategy next spring to protect the country’s bees and many other pollinating insects.

We’re reducing the amount of waste we send to landfill and we’re investing in cleaning up England’s rivers, lakes and waterways.

We’ve promoted animal welfare, including ending the practice of keeping laying hens in tiny battery cages and, for the first time, implementing welfare standards for game-birds. We are also strongly committed to working with our international partners to tackle the illegal wildlife trade, and in a few months we’ll be hosting a major international conference in London to agree the action that is needed.

We’re seeing encouraging progress on biodiversity – this year’s biodiversity assessment report shows, for example, more land and sea protected and fish stocks better managed.

We have also now implemented the Marine and Coastal Access Act, which seeks to improve the management and protection of our marine environment and increase public access to our coastal paths: so more people can access the beauty of Britain’s landscape, and we’re going to be saying more about marine conservation shortly.