By David Suzuki
People who deny that humans are wreaking havoc on the planetsa国际传媒檚 life-support systems astound me. When confronted with the obvious damage wesa国际传媒檙e doing to the biospheresa国际传媒攆rom climate change to water and air pollution to swirling plastic patches in the oceanssa国际传媒攕ome dismiss the reality or employ logical fallacies to discredit the messengers.
Itsa国际传媒檚 one thing to argue over solutions, but to reject the need for them is suicidal. And to claim people cansa国际传媒檛 talk about fossil fuels and climate change because they use fossil fuelsa国际传媒揹erived products, such as plastic keyboards, is nonsensical.
Theresa国际传媒檚 no denying that oil, coal and gas are tremendously useful. They hold super-concentrated energy from the sun and are used to make a variety of products, from medicines to lubricants to plastics. The problems arensa国际传媒檛 the resources but our profligate use of them. Using them more wisely is a start. In many cases, we also have alternatives.
Burning oil, coal and gas to propel inefficient automobiles and generate electricity illustrates the problem. According to the U.S. Environmental Protection Agency, about 14 to 30 per cent of a gasoline-powered carsa国际传媒檚 fuel is used to propel the vehicle. That energy is mostly moving a tonne of car, which often holds one 80-kilogram person. Thatsa国际传媒檚 a lot of fuel and energy to transport one or two people.
Looked at this way, even electric or hybrid personal vehicles arensa国际传媒檛 terribly efficient, but they at least pollute less than gas-powered vehiclessa国际传媒攁nd the EPA notes 74 to 94 per cent of an electric carsa国际传媒檚 energy goes to moving the vehicle and its passengers. Energy-efficient or electric vehicles are moving in the right direction, but public transit and active transport such as cycling and walking are better alternatives.
Fossil fuel power plants are also inefficient. Only about a third of the power generated reaches consumers. More is lost through wasteful household or business use. A lot of energy is also required to extract, process and transport fuels to power plants. Because of the many methods of generating and supplying electricity with renewable sources such as solar, wind and geothermal, itsa国际传媒檚 tough to put exact numbers on efficiency, but far less power is wasted. Because the energy sources are inexhaustible and donsa国际传媒檛 produce emissions, waste isnsa国际传媒檛 as big a concern as with fossil fuelssa国际传媒攁lthough itsa国际传媒檚 still important.
Most plastics are also made from oilsa国际传媒攚hich presents another set of problems. As with fuels, people started making plastics from oil because it was inexpensive, plentiful and easy for corporations to exploit and sell. Our consume-and-profit economic system meant automakers once designed cars not to be efficient but to burn more fuel than necessary. Likewise, manufacturers create far more plastic products than necessary. Many items donsa国际传媒檛 serve much purpose beyond making money. Sometimes the packaging is worth more than the contents!
Itsa国际传媒檚 so bad that researchers from Australiasa国际传媒檚 University of Tasmania and the Royal Society for the Protection of Birds recently found 18 tonnes of plastic garbagesa国际传媒�239 items per square metresa国际传媒攕cattered across a small South Pacific island 5,000 kilometres from the nearest human occupation. Scientists have also found massive, swirling patches of plastic in the North and South Pacific oceans, each holding around 400,000 plastic particles per square kilometre. University of Tasmania researcher Jennifer Lavers said plastic in the oceans could be as great a threat as climate change. sa国际传媒淵ou put carbon dioxide into the atmosphere or plastic in the oceans and both will stick around,sa国际传媒� she told New Scientist.
As with fossil fuels, the first step to addressing the problem is to substantially reduce plastics usage. There are also alternatives. To begin, we should recycle everything already produced. Plastics can also be made from renewable resources, such as hemp, or any fast-growing plant that contains cellulose. In fact, plastics were once commonly made from animal products such as horn and tusks, but when those became expensive, people started using plants, switching to oil products when that became more profitable.
We can and must cut down on fossil fuels and plastics. We also have alternatives, and ways to prevent plastics from ending up in the oceans. Those who look away and pretend we donsa国际传媒檛 have a problem are only slowing solutions and accelerating our self-destruction.
David Suzuki is a scientist, broadcaster, author and co-founder of the David Suzuki Foundation. Written with contributions from David Suzuki Foundation Senior Editor Ian Hanington. David Suzukisa国际传媒檚 latest book is Just Cool It!: The Climate Crisis and What We Can Do (Greystone Books), co-written with Ian Hanington.
Learn more at www.davidsuzuki.org.
