We’re well into the Dry season now and the birds come to water whenever they can. These White-gaped Honeyeaters (Lichenostomus unicolor) came to bathe under the sprinkler this morning.
Rain? What’s that? We had a few drops (almost few enough to count individually) a couple of days ago, but before then?
I had to look at the BoM’s records. They show we have had nothing over 0.2mm on any one day all the way back to early July when we had 12.4mm one day and a sprinkling on the days either side of it. June’s total was … wait for it … 2.2mm and in May the total was only 1.8mm. We had 10 mm in April but, really, it stopped raining at the end of March.
We’re officially in Winter now and I reckon we moved definitively into the Dry season a fortnight ago, so it’s worth looking back at the Wet and seeing what’s likely to happen to our water supply in the Dry.
Wet season rainfall and the year to come
BoM climate data reveals that our rainfall so far this year, Jan – Feb – Mar – April – May, was 118 – 285 – 343 – 10 – 2 mm, for a total of 760 mm.
Townsville’s ongoing drought has encouraged many of us, especially the keen gardeners, to think seriously about bores, grey water systems and rainwater tanks. This post attempts to arrive at a credible answer to the first question we must ask about tanks: are they even useful?
We have been hearing from two schools of thought on the question for as long as we have been in Townsville, more than 25 years: “Yes, of course!” and “No! The dry season is so long and so dry that no tank will last through it.” One group must be wrong, and the only way to find out is to crunch a few numbers. Continue reading “Are rainwater tanks useful in Townsville?”
Green Path tries to keep up with what’s happening in the renewable energy sphere, since it’s so important to our battle against global warming, but so much is happening that we don’t often pause to take stock. Fortunately, the Climate Council has done that for us, producing a report, Fully Charged: Renewables and Storage Powering Australia.
Its key points are:
The cost of lithium-ion batteries has fallen by 80% since 2010. Costs are expected to halve again by 2025 (under 7 years).
6,750 new household batteries were installed in 2016. The market is predicted to have tripled in size in 2017, with over 20,000 new installations.
Renewable energy now represents 16% of Australia’s electricity generation.
VIC, QLD and the NT are also investing in grid scale battery storage technology.
Federal, QLD and TAS governments are also considering developing pumped hydro projects.
The Australian electricity grid (NEM) and old fossil fuelled power stations are increasingly vulnerable to worsening extreme weather events, particularly as these power stations age.
More than 50% of Australia’s coal fleet will be over 40 years old by 2030.
Australia could reach 50% renewables by 2030 without significant new energy storage.
That is (nearly) all very good news, of course, but we need to keep it in perspective: 50% by 2030 is good but, globally, we need to reach zero carbon emissions before 2050 to avoid the worst of climate change, so there is still much more to be done. Continue reading “Renewable energy update”
Most of us know by now that we need to decarbonise the global economy – fast – if we are to have any hope of avoiding catastrophic climate change. Fortunately, the technology to do just that is booming, charging ahead so quickly that merely keeping up with the news is difficult.
Last year, for most of us, was the Year of the Battery. Tesla’s big South Australian battery did something its many little Powerwalls couldn’t, i.e., make battery storage seem like a serious option for the real world rather than just a cool idea. Bloomberg’s 2018 outlook report sees this continuing and allowing electric vehicles to undercut conventional, internal combustion engine cars on both lifetime and upfront cost by the mid-to-late 2020s.
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