Britain has lost half its wildlife. Now’s the time to shout about it | Michael McCarthy

Modern farming has wiped out billions of insects and birds. Plans to restore them will only work with public pressureEver been on a protest march for the environment? If you’re young and you care about things – if you’re old, for that matter – you may well have been, and I bet I can guess the theme of the demo. It was probably about climate change, and quite right too, global warming being an unparalleled threat to our very existence. It might have been about nuclear