The length of time one should humidify the air depends on the specific needs of the environment and the individuals within it. In general, it is recommended to maintain a relative humidity level between 30-50% for optimal comfort and health. This may require continuous humidification in dry climates or during the winter months, while in more humid environments, it may only be necessary to humidify for shorter periods of time. It is important to monitor the humidity levels and adjust the humidification as needed to maintain a healthy and comfortable environment. **

In the height of summer, it is generally better to dehumidify living spaces rather than humidify them. High humidity levels can make the air feel even hotter and more uncomfortable, and can also promote the growth of mold and mildew. Dehumidifying the air can help to make the space feel more comfortable and can also help to prevent moisture-related issues. However, it's important to strike a balance, as excessively dry air can also be uncomfortable and can cause issues such as dry skin and respiratory irritation. **

To humidify chicken eggs during natural incubation on the 18th day, you can add a small amount of warm water to the incubator to increase the humidity level. This can be done by placing a small container of warm water inside the incubator or by using a spray bottle to mist the eggs and the inside of the incubator. It's important to monitor the humidity levels closely and make adjustments as needed to ensure the eggs have the proper amount of moisture for successful hatching. Be careful not to add too much water, as excessive humidity can also be harmful to the developing embryos. **

The caricature of the summit conference in Helsinki shows the leaders of the United States and Russia, Donald Trump and Vladimir Putin, sitting at a table with Trump holding a puppet string attached to Putin. This caricature is a satirical representation of the perception that Trump is under the control or influence of Putin, suggesting that Putin is pulling the strings and manipulating Trump. The image reflects the controversy and speculation surrounding the relationship between the two leaders and the potential influence of Russia on the United States. **

A symposium is a formal gathering or meeting where experts in a particular field come together to discuss and exchange ideas on a specific topic. It is often organized as a series of presentations, panel discussions, and Q&A sessions, allowing participants to share their knowledge and insights with each other. Symposia are commonly held in academic and professional settings, providing a platform for networking, collaboration, and learning within a specific discipline or industry. **

"Der Kongress tanzt" is a German phrase that translates to "The Congress Dances" in English. The phrase originated from the Congress of Vienna in 1814-1815, where European diplomats and leaders gathered to reorganize Europe after the Napoleonic Wars. The phrase is a metaphor for the diplomatic and political maneuvering that took place during the Congress, likening it to a dance where participants carefully navigated their relationships and alliances. It reflects the complex and intricate nature of international diplomacy and negotiations during this historic event. **

A convention is a formal agreement or a set of accepted norms and practices that govern behavior in a particular context or industry. It is a customary way of doing things that is widely recognized and followed by a group of people. Conventions help to establish consistency, order, and predictability in social interactions or professional settings. They can vary across different cultures, societies, or fields of study. **

The G20 summit is a meeting of the leaders of the world's 20 largest economies, representing both developed and developing countries. The summit provides a platform for these leaders to discuss and coordinate on global economic issues, such as trade, finance, and development. It is an opportunity for countries to work together to address common challenges and promote global economic stability and growth. The G20 summit also serves as a forum for leaders to address pressing international issues, such as climate change, terrorism, and global health crises. **