So many global conservation issues bombard us these days. Television, the internet and printed media give us horrifying examples of pollution, depleted resources, human starvation and conflict, species extinction.
It is tempting to say "there's nothing I can do to change this" and switch off.
True, one can donate money, sign petitions or make written submissions on issues like global warming, the energy crisis, biodiversity loss or human over-population (issues which are all interlinked, of course).
But anything that we can do is unlikely to get at the root causes of such problems because their solutions need international action and changes in the thinking or actions of huge numbers of people.
In the 1960s there was a rise in public awareness of ecology that became part of school and university teaching. Science courses included ecological principles, such as the inter-relatedness of living things, population dynamics and limits, nutrient cycling and energy conservation. Terms like "ecosystem", "ecology", "energy flow", "food web", "trophic levels" and "biodiversity" became familiar, even outside the classroom.