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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.

In the 1960s, the municipality of Amsterdam came up with an ambitious plan to create a new residential area in the Bijlmermeer with a strict division between living and working. Attracting residents was difficult because of the bad reputation that the Bijlmer acquired, the lack of facilities in the area and the competition from single-family dwellings elsewhere in the region, which kept Amsterdam families away.

The worst air disaster ever occurred on the runway of the airport on the Canary Island of Tenerife. Two Boeings collided there at full speed. One Boeing did not have take-off clearance yet, but other circumstances also played a role. It was very foggy and there was confused communication with the control tower. Since then, flying has become much safer. Airline staff are allowed to make mistakes and admit them, so that everyone can learn from them.