Nitrogen levels are too high, as are levels of particulate matter, too much manure, CO2 emissions continue to rise, as does methane emissions, biodiversity drops dramatically, the agricultural land is exhausted, natural gas fields collapsing, heat waves of 40 degrees,… Continue Reading
Why didn’t we realize this before… Since a year or two there has been a working group of a number of collaborating scientists in Europe, under the wings of an international NGO (iiSBE) who are investigating what the ‘carbon budget’… Continue Reading
Some time ago , I was in a meeting for writing a biobased building manifest. Very interesting discussions, which were hardly ever held at the policy level. Although I get signals that the discussion about the impact of materials, as… Continue Reading
Amsterdam needs around 50,000 charging points for electric cars. 50,000? Really? Have we gone completely nuts or what? Doesn’t alarm bells start ringing: “What the hell are we doing?” Where do all these raw materials come from, and the energy… Continue Reading
The introduction to the Dutch version of my book was headed: the world on fire. ( after summer in English available!) “Well”, was often the reaction, “a bit exaggerated, isn’t it? Sounds like doomsday thinking right?” But it is not… Continue Reading
Currently we are deeply concerned with the energy transition. However, our main problem is not energy, but material. There is enough energy without us having to exhaust it or without having nasty side effects such as global warming. Think of… Continue Reading
Last month the OECD published its report with the latest figures on material consumption worldwide. [1] Currently that is 79 GigaTon of materials per year, and we are going to 167 Gt (!) in 2060. Every year. This includes a… Continue Reading
In the context of end-of-year fireworks, lets discuss nuclear energy. Because its back on the agenda. Its indeed an option, but then, the discussion should use the right arguments. Up to now, the discussion is about the advantages or disadvantages… Continue Reading
Looking for answers in areas that are not my specialism , I recently took along three books on holiday. And that was a very interesting choice, as well as the coincidental order in which I read them. I understand –… Continue Reading
(master-classes on this topic and others, see on the right) ” What is Circular Building really?” , a Dutch journalist twittered, being confused about the debates going on. Its not clear yet, apparently, so lets give it a try. The… Continue Reading