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RAF Dunsfold
Dunsfold Aerodrome (former ICAO code EGTD) is an unlicensed airfield in Surrey, England, near the village of Cranleigh. It extends across land in the villages of Dunsfold and Alfold. It was built by the Canadian Army and civilian contractors as a Class A bomber airfield for Army Co-operation Command. It was commanded by the Royal Canadian Air Force from 1942 to 1944 and was known as Royal Canadian Air Force Station Dunsfold. Under RAF control it was RAF Dunsfold. Post-war it was used by Hawker Siddeley and then its successor British Aerospace. From 2002 to 2020, it was used as the main site of the BBC show ''Top Gear''. History Construction and military use Canadian engineers were charged with the construction of the aerodrome. Such projects had previously taken up to a year to complete and this site was complicated by the two hundred acres of woodland that first had to be cleared. The Canadian sappers had access to large-scale earth moving equipment from North America o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete
Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminum combined. Globally, the ready-mix concrete industry, the largest segment of the concrete market, is projected to exceed $600 billion in revenue by 2025. This widespread use results in a number of environmental impacts. Most notably, the production process for cement produces large volumes of greenhouse gas emissions, leading to net 8% of global emissions. Other environmental concerns include widespread illegal sand mining, impacts on the surrounding environment such as increased surface runoff or urban heat island effect, and potential public health implications from toxic ingredients. Significant research and development is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
