This Pope asks us to rethink our lifestyle in a very radical way, not only because of the risks, but because it is the right thing to do:
We can free our life and the world from the poisons and contaminations that could destroy the present and the future. We can uncover the sources of creation and keep them unsullied, and in this way we can make a right use of creation, which comes to us as a gift, according to its intrinsic requirements and ultimate purpose. This makes sense even if outwardly we achieve nothing or seem powerless in the face of overwhelming hostile forces. (Spe Salvi 35).This is not an appeal we should ignore. Every year we see more reasons to make it a priority for Catholic action. For example, 2010 is the UN-designated "Year of Biodiversity". There is a useful briefing here by my brother, and an article by Geoffrey Lean titled "We're Losing the Riches of the World" tries to summarize the situation:
Species are now going extinct at between 1,000 and 10,000 times the natural rate: by some estimates, half of the 13 million or so forms of life on the planet will disappear by the end of the century. That would be the greatest extinction since the death of the dinosaurs 65 million years ago, from which life took millions of years to recover....Forty per cent of the world's forests – which absorb rainwater, releasing it gradually rather than letting it run straight off to cause floods – have been felled in the last three centuries. A third of its coral reefs – the most vital breeding grounds for fish – have been seriously damaged. And every year a staggering 25 billion tons of precious topsoil is eroded away.The Pope believes that Christianity offers the right balance between the value of the human person and the value of nature as God's creation. Yet he adds that environmentalists have had good reason to reject believers as potential allies – for “modern Christianity, faced with the successes of science in progressively structuring the world, has to a large extent restricted its attention to the individual and his salvation. In so doing it has limited the horizon of its hope and has failed to recognize sufficiently the greatness of its task” (Spe Salvi 25). This restriction of Christianity to the individual level is what we need to overcome. As Christians we have been too hasty to “limit the horizon of our hope”, so that hope has indeed become a feeble-minded excuse for inaction.