Every year hundreds of millions of people around the world in more than 7,000 cities in over 190 countries take part by switching off power for 60 minutes as a symbolic gesture of solidarity to show they care about our planet’s future.
This year, Earth Hour is at 8.30pm local time Saturday 27 March. Around the continent, Australians will gather without electricity, to make the #SwitchforNature. Thousands of people will demonstrate their support for the switch to a renewables-based economy for Australia.
Individual actions can benefit our planet, while symbolically demonstrating support for a renewable future for our country, and for the world.
Earth Hour started in Sydney in 2007, and has since spread around the globe. Central to Earth Hour is advocacy for increasing renewable sources of energy. There are many advantages to using renewable energy sources.
Renewables (solar, wind and hydro) now comprise a quarter of the mix in the National Electricity Market. In 2023, it is likely that renewables will pass black coal to become the largest electricity source.
Solar and wind energy are already huge industries globally, and employ 27,000 people in Australia. This reflects a doubling in just three years. And solar and wind electricity in Australia already costs less than electricity from new coal and gas plants.
A recent study has demonstrated that solar and wind plants built between 2018 and 2025 would add 70,000 gigawatt hours of new electricity supply – equivalent to more than a third of what is currently used across the national grid each year.
This would mean that five of Australia’s remaining 16 coal power plants could be financially unviable by 2025. The study estimates that renewable energy could make up 40% to 50% of electricity by 2025. It would force output from coal and gas-fired power stations to fall by an amount between 28% and 78% respectively over the seven years.
Closing these plants would make a good contribution to reducing Australia’s greenhouse emissions. It would also be likely to push down the average wholesale electricity price to 2015 levels. Revenue at coal and gas-fired plants would be hit on two fronts: they would not be able to sell as much electricity, and the price of the electricity would be lower.
The raw materials needed for renewable energy are abundant and won’t run out. A solar panel needs silicon, a glass cover, plastic, an aluminium panel frame, copper and aluminium electrical conductors and small amounts of other common materials. These materials are what our world is made of. Recycling panel materials at the end of their life adds only slightly to larger existing recycling streams.
And nearly three-quarters of the global population lives in the planet’s sunbelt (lower than 35 degrees of latitude). This includes most developing countries, where most of the growth in energy consumption and greenhouse emissions is located.
Finally, renewables are much safer. Solar panel accidents pale in comparison to spilled radioactive material (like Fukushima or Chernobyl), an oil disaster (like BP’s Deepwater Horizon), or a coal mine fire (like Hazelwood in Victoria). Wind and solar electricity eliminates oil imports, oil-related warfare, fracking for gas, strip mining for coal, smokestacks, car exhausts and smog.
So let’s make the #SwitchForNature, and let’s make it start now!