My first discovery helps back up the many reasons why we should including native plants in our gardens. In a census done on 1st January 2012 it put the population of the United States of America at 312,780,968! A pretty big number, but now compare that with how many square mile are in the United States, 3,794,083. Divide these two numbers together and that leaves you with 82.5 people per square mile. With such a high demand on our shrinking land, our gardens may end up being a safe haven to protect our native plants protection.
If the pressure of land wasn't already so great, the next piece of brow raising information comes from the Golf Course Superintendents of America group. They estimated that golf courses in the US now take up 3,507 square miles. If you take the equation from above, it only displaces 289,327.5 people from their allocated square mile so a few can hit a small white ball into an even smaller hole in the ground. By the way, the 3,507 square miles of golf courses is equivalent in size to two Rhode Islands and the state of Delaware. Now add in all the water, fertilizer and pesticides they consume to keep the grass green its no wonder there's growing concern over the environmental impact they cause.
But lets not forget the all the other 'greens'. Its estimated that 80% of homes across the country have lawns surrounding it. Our obsession with grass has fueled a $40 billion dollar a year business that requires 90 million pounds of fertilizer and 78 million pounds of pesticides just to keep our lawns green and bug free. Some clever person even figured out that we spend 3 billion hours a year pushing or riding a gas powered mower around to keep our grass at the perfect shag pile carpet height. Just one gas powered mower can give off the equivalent of 11 cars worth of emissions!
However, what does any of this have to do with the title of the post? Well, Australian Scientist have discovered the the smell of fresh cut grass reduces stress and provides a positive reaction in people. To skim over all the details of the study, a senior lecturer from University of Queensland's bio-medical school discovered that the hippo-campus (the part of our brain that in involved in emotions, learning and memory), remain healthier if exposed to the aroma of fresh cut grass, thus improving long-term memory. So maybe, our desire to play golf or just to cut the grass every weekend is part of our unconscious desire to giving our brain 'a fix'!
But wait, there's more; a German study looking to understand this fragrance discovered that it is actually a chemical compound released from distressed plants and to alert others of their attack. Yep, plants do actually communicate with each other! Those clever scientists discovered this while studying wild tobacco, which they noticed accelerated amounts volatile organic compounds released when a plant was under attack from caterpillars. The compound actually worked like a pheromone, which attracted predatory 'Big Eyed Bugs' who regularly feed on the caterpillars. So in reality, that smell of cut grass that we all love is literally a gas released before it hits the fan!
So, in summing up all of these findings we can draw the conclusion that humans get off on the smell of vegetative trauma. So great is our need to get a high, we've sacrificed our land to grow even more of the sweet smelling stuff to aid our addiction. Fortunately, because of our exposure to this secondhand gas, our long term memory has improved so much that we can reminisce about all the native plants that used to grow around us.
Now that's some good S#*t!