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With biomass plants, the government wanted to ensure that the climate targets would be met. The government set aside 10 billion euros for the construction of 628 biomass plants. Objections to the biomass plants soon arose: they would not be as CO2-neutral as was assumed and there would be more useful ways to use the biomass.

In 1905, the popsicle was invented by eleven-year-old Frank Epperson. He made a drink with water and some soda powder that he stirred through with a stick. Because his mother told him to go to sleep, he left the drink. When he woke up the next morning, it had frozen and the drink with the stick in it was frozen too. This was the first popsicle.

Columbus was looking for a faster sailing route to the Dutch East Indies. He planned to sail there via the West. With the financial support of the Spanish Queen Isabella, his ships left for the West, but instead of finding a new route to the Dutch East Indies there, he found the undiscovered continent of America.

Volunteers built a staircase covered with plants between the Centraal Museum and the canal in Utrecht. For three years, they worked with all their might on the staircase and the work of art cost 243,800 euros. Now a contract worker from the municipality of Utrecht has accidentally removed all the plants, not realising that it was a work of art.

The yellow fever mosquito in South America transmits several diseases in large numbers, including the dengue virus, the yellow fever virus, chikungunya and the Zika virus. The cost of dengue on Aruba is high and many agreed on the need for these actions. It was not possible to raise the intended amount; more than half was promised, but that was all. More parties were sceptical and eventually the project was stopped.

Because of the corona pandemic, many events had to move to online environments. One advantage of this is the elimination of travel time. Unfortunately, the events did not always run smoothly because they sometimes encountered technical difficulties. An example is an online event about online events, where more than half of the participants could not get into the meeting.