I notice you still haven't addressed their anti-nuke power stance.
Also just from skimming through that page here are a bunch of other really stupid policies that would discourage me from voting Green:
The Green Party is opposed to shooting and hunting and would bring an end to these 'sports'. Until this happens The Green Party are calling for magazines that promote the shooting and hunting of animals to have blank wrapping and be kept out of the reach of children.
Obsession with animal rights over human enjoyment (animals die much more horribly in the animal kingdom all the time, shooting them kills them downright humanely).
The Green Party is deeply concerned about sexual violence and all forms of violence perpetrated against civilians, particularly the high levels of violence against women and children, in situations of armed conflict.
Stupid feminist assumption that women always get the raw deal. Reminds me of that Hillary Clinton quote that women are the main victims of war because their husbands and sons die.
The Green Party reaffirms it's commitment to a liberal immigration policy. Everyone is equal no matter what the colour of their passport. The Coalition's policy of introducing an immigration cap restricts people's rights based purely on their nationality, harms the economy and is not conducive to a free and happy society.
BS pie-in-the-sky thinking that ignores the massive population density of England and the huge problem with integrating mass numbers of immigrants.
The law to follow Norway's in requiring that companies listed on the Stock Exchange have 40% of their board members being female within five years of the date of the passing of the legislation.
Idiotic feminist assumption that the whole reason fewer board members are women must be down to sexism, rather than women not working so hard / long hours. In practice, forcing a certain % of women is going to give some women unfair advantages by promoting them when a man would've done the job better. Theirs is actually a really sexist policy.
I do also agree with a bunch of their policies. The trouble is that there's too much total crap dogma that's built up within the Greens that isn't going to go away any time soon.