One of the joys of being a grandparent is getting to see the world again through the eyes of a child.

My Prime Minister regards the economy as our highest priority and forgets that economics and ecology are derived from the same Greek word, oikos, meaning household or domain. Ecology is the study of home, while economics is its management. Ecologists try to define the conditions and principles that enable a species to survive and flourish. Yet in elevating the economy above those principles, we seem to think we are immune to the laws of nature. We have to put the ‘eco’ back into economics.

Just as human activity is upsetting Earth's carbon cycle, our actions are altering the water cycle.

There are some things in the world we can't change.

The fact of the matter is that today, stuff-selling mega-corporations have a huge influence on our daily lives. And because of the competitive nature of our global economy, these corporations are generally only concerned with one thing - the bottom line. That is, maximising profit, regardless of the social or environmental costs.

If we pollute the air, water and soil that keep us alive and well, and destroy the biodiversity that allows natural systems to function, no amount of money will save us.

Human use of fossil fuels is altering the chemistry of the atmosphere; oceans are polluted and depleted of fish; 80 per cent of Earth's forests are heavily impacted or gone yet their destruction continues. An estimated 50,000 species are driven to extinction each year. We dump millions of tonnes of chemicals, most untested for their biological effects, and many highly toxic, into air, water and soil. We have created an ecological holocaust. Our very health and survival are at stake, yet we act as if we have plenty of time to respond.