Nowadays, everyone knows that we should care about the environment. But Greenpeace was only founded in 1971 ¹; public awareness of conservation issues are therefore a relatively recent thing.

Now we know that we're being deliberately contentious here, but can anyone tell us:

• Why shouldn't we leave the big clean-up to future generations?

• Won't the hole in the ozone layer just make the planet nice and warm?

• It's been estimated that we lose one species every hour, but hasn't that been the case since life began? No-one missed the dinosaurs, did they?

• Is it really worth recycling glass? Don't bottle banks just create useless bottle mountains?

• The fish and reptiles in the Miami Everglades are changing sex, but does it matter?

• Landfill sites. Are they a bad thing? Why?

• Should all countries adopt New Zealand's anti-nuclear stance?

• The North Sea is being overfished. So should we veto fish fingers?

• Are genetically modified foods really any worse for you than organic produce? Why?