Norman Foster designed and built the Gherkin, also known as 30 St Mary Axe, in London between 2001 and 2004. The building, which is a distinctive part of the London skyline, is known for its unique shape and energy-efficient design. It has become an iconic landmark in the city and is a testament to Foster's innovative architectural style. **

Metal is generally harder than both stone and wood. While stone can be quite hard, it can also be brittle and prone to breaking. Wood is softer than both stone and metal, making it the least hard of the three materials. Metal, on the other hand, is known for its strength and durability, making it the hardest of the three materials. **

Heating with wood can be considered CO2-neutral if the wood comes from sustainably managed forests and is replaced at a rate that allows for the carbon emissions from burning the wood to be reabsorbed by new tree growth. However, if the wood comes from unsustainable sources or if the harvesting and transportation processes result in significant carbon emissions, then heating with wood may not be climate-neutral. It is important to consider the entire lifecycle of wood heating, from forest management to combustion, in order to accurately assess its carbon impact. **

Yes, stone is generally harder than wood. Stone is a naturally occurring material that is formed through geological processes, making it denser and more durable than wood. Wood is a natural organic material that is softer and more prone to damage compared to stone. Stone is often used in construction and sculpture due to its hardness and durability. **

CO2-neutral wood refers to wood that has been harvested and used in a way that does not contribute to an increase in carbon dioxide levels in the atmosphere. This can be achieved through sustainable forestry practices, where trees are replanted to replace those that have been harvested, and through using the wood as a renewable energy source or in products that store carbon, such as in construction materials. By ensuring that the amount of carbon released from the wood is balanced by the amount absorbed during the growth of new trees, the overall impact on atmospheric CO2 levels is neutral. **

There are several wristwatches available in wood or stone materials. Some popular options include wooden watches made from sustainable materials like bamboo or sandalwood, as well as stone watches crafted from materials such as marble or granite. These unique timepieces offer a stylish and eco-friendly alternative to traditional metal or leather watches. Brands like Jord, Treehut, and Analog Watch Co. are known for their high-quality wood and stone watches. **

Wristwatches made of wood or stone are typically crafted using natural materials such as bamboo, sandalwood, or marble. These unique timepieces offer a stylish and eco-friendly alternative to traditional metal or plastic watches. The use of wood or stone in watchmaking adds a touch of nature-inspired elegance to the design, making them popular among individuals looking for a distinctive and sustainable accessory. **

Wristwatches made from wood or stone are available in the market. These unique timepieces offer a natural and eco-friendly alternative to traditional metal or plastic watches. They are popular for their distinctive look and feel, making them a stylish choice for those looking for something different in their accessories. Wood and stone watches come in a variety of designs and styles, catering to different tastes and preferences. **