A natural selection

We flock to the city, attracted by that sort of culture and vibrancy which only seems to spring up when people live piled on top of each other in their thousands or millions. But that urban edge comes with a price - as the people pile in the nature is squeezed out; we are removed from our natural habitat and we feel an ennui at its loss. And that's undoubtedly what motivated the artists below to bring a bit more sky, parrots and potted ferns into Manchester's grey corners.