Caroline's speech looks superb, especially the comment on slavery...
This is from the Beeb this morning:
Climate change is "the greatest threat to humanity", Ms Lucas will add, saying: "They say it's up to us - do your bit, act on CO2, we're in it together.
"No wonder people are confused. The greatest threat this country faces - up there with international terrorism, the rise of Fascism in the 1930s.
And the government is telling us to change our light bulbs and turn our washing down to 30 degrees."
Ministers must "take the lead", she will say.
Ms Lucas will add: "What if William Wilberforce had said 'Yes, we know slavery is wrong but we have to think of the economy. So could you just cut down a bit? Own one slave instead of two?'
"When Neville Chamberlain returned from Munich and waved that scrap of paper promising peace in our time, at least he believed it.
"Fool that he was, he honestly thought that he had reached a deal with Adolf Hitler. What excuse do our current leaders have?
"Labour have had nearly 12 years in power. And they have done nothing."