The strike occurred during the 2019–20 Persian Gulf crisis, which began after the U.S. withdrew from the 2015 nuclear deal with Iran in 2018, reimposed sanctions, and accused Iranian elements of fomenting a campaign to harass U.S. forces in the region. On 27 December 2019, the K-1 Air Base in Iraq, which hosts Iraqi and U.S. personnel, was attacked, killing an American contractor. The U.S. responded by launching airstrikes across Iraq and Syria, killing 25 Kata'ib Hezbollah militiamen. Days later, Shia militiamen and their supporters retaliated by attacking the U.S. embassy in the Green Zone.
There is no silver bullet in electricity or energy demand and bill management, because customers (sites) have different specific situations, e.g. different comfort/convenience needs, different electricity tariffs, or different usage patterns. Electricity tariff may have a few elements, such as daily access and metering charge, energy charge (based on kWh, MWh) or peak demand charge (e.g. a price for the highest 30min energy consumption in a month). PV is a promising option for reducing energy charge when electricity price is reasonably high and continuously increasing, such as in Australia and Germany. However, for sites with peak demand charge in place, PV may be less attractive if peak demands mostly occur in the late afternoon to early evening, for example residential communities. Overall, energy investment is largely an economical decision and it is better to make investment decisions based on systematical evaluation of options in operational improvement, energy efficiency, onsite generation and energy storage.
More InfoIn 1881, Charles Fritts created the first commercial solar panel, which was reported by Fritts as "continuous, constant and of considerable force not only by exposure to sunlight but also to dim, diffused daylight." However, these solar panels were very inefficient, especially compared to coal-fired power plants. In 1939, Russell Ohl created the solar cell design that is used in many modern solar panels. He patented his design in 1941. In 1954, this design was first used by Bell Labs to create the first commercially viable silicon solar cell. In 1957, Mohamed M. Atalla developed the process of silicon surface passivation by thermal oxidation at Bell Labs. The surface passivation process has since been critical to solar cell efficiency.
More InfoA notable feature of Indian food is the existence of a number of distinctive vegetarian cuisines, each a feature of the geographical and cultural histories of its adherents. The appearance of ahimsa, or the avoidance of violence toward all forms of life in many religious orders early in Indian history, especially Upanishadic Hinduism, Buddhism and Jainism, is thought to have been a notable factor in the prevalence of vegetarianism among a segment of India's Hindu population, especially in southern India, Gujarat, and the Hindi-speaking belt of north-central India, as well as among Jains. Among these groups, strong discomfort is felt at thoughts of eating meat, and contributes to the low proportional consumption of meat to overall diet in India. Unlike China, which has increased its per capita meat consumption substantially in its years of increased economic growth, in India the strong dietary traditions have contributed to dairy, rather than meat, becoming the preferred form of animal protein consumption accompanying higher economic growth.
More InfoIn the last 50 years, fashions have changed a great deal in India. Increasingly, in urban settings in northern India, the sari is no longer the apparel of everyday wear, transformed instead into one for formal occasions. The traditional shalwar kameez is rarely worn by younger women, who favour churidars or jeans. The kurtas worn by young men usually fall to the shins and are seldom plain. In white-collar office settings, ubiquitous air conditioning allows men to wear sports jackets year-round. For weddings and formal occasions, men in the middle- and upper classes often wear bandgala, or short Nehru jackets, with pants, with the groom and his groomsmen sporting sherwanis and churidars. The dhoti, the once universal garment of Hindu India, the wearing of which in the homespun and handwoven form of khadi allowed Gandhi to bring Indian nationalism to the millions,is seldom seen in the cities, reduced now, with brocaded border, to the liturgical vestments of Hindu priests.
More InfoPaying to have solar panels cleaned is often not a good investment; researchers found panels that had not been cleaned, or rained on, for 145 days during a summer drought in California, lost only 7.4% of their efficiency. Overall, for a typical residential solar system of 5 kW, washing panels halfway through the summer would translate into a mere $20 gain in electricity production until the summer drought ends—in about 2 ½ months. For larger commercial rooftop systems, the financial losses are bigger but still rarely enough to warrant the cost of washing the panels. On average, panels lost a little less than 0.05% of their overall efficiency per day. There may also be occupational hazards of solar panel installation and maintenance. But birds nests and other debris that can get lodged under them that can cause disruption to the system and potentially fire if there are any loose connections or just generally degrade over time.
More InfoWe don't show ads. Help us keep it that way.