We have heard all about Al Gore's inconvenient truths on climate change. Now comes an extremely convenient truth from his German counterpart. Social Democrat MP Hermann Scheer, who has been dubbed more revolutionary than Greenpeace, says the great unspoken truth is how painless it will be to convert the world to renewable energy, especially solar power. So much so that the Kyoto protocol is a waste of time that makes what is easy and cheap seem hard and expensive.