Cake batter can be easily mixed with a wooden spoon, but bread dough, with its higher solids content, requires a lot more energy to be properly mixed. Similarly, wood pulp becomes more difficult to mix with bleach liquor as the solids content increases, requiring higher mixing energy.
A few years ago I was at a roadside viewpoint in Utah looking at a slope covered with poplar trees whose leaves were starting to turn yellow in the cold October air. An interpretive panel pointed out that while different shades of yellow could be seen in different groups of trees, all of the trees in each grouping were exactly the same shade of yellow.
In his book published in early 2021, “How to Avoid a Climate Disaster”, Bill Gates points out that the world is currently adding 51 billion tons per year of greenhouse gases to the atmosphere, and needs to reach net-zero emissions by 2050 in order to meet the Paris Agreement target of limiting the increase in global temperature by only 1.5 °C.
In a recent blog post, I discussed the importance of using the scientific method in evaluating new products. My historical reference to the origins of the term “snake oil” provoked some interesting reactions, but it was a device to attract the attention of readers, and apparently it worked!
The world has changed in the last few weeks due to the Covid-19 pandemic. Those of us who live in a city are dealing with the lockdown by working from home and only emerging to exercise and buy groceries. But what’s it like for large companies operating production facilities in the forest products industry?
There are two good reasons why the world should be focused on reducing carbon footprint. The first, obviously, is to slow the effects of global warming and the drastic consequences it has for the planet’s future. The second reason, sometimes forgotten or ignored, is that non-renewable or fossil resources will run out, possibly as soon as 2060.
The crash earlier this year of an Ethiopian Airlines Boeing 737 Max that took the lives of all passengers and crew aboard appears to have been caused by the combination of an angle-of-attack sensor that was sending an incorrect signal and control software that reacted to this signal, not allowing the pilot to override it.