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  मारियो मोलिना एक मेक्सिकन रसायन शास्त्री थे जिन्होंने अपने शोध के दौरान ओजोन परत के नुकसान के लिए नाइट्रोजन ऑक्साइड और क्लोरोफ्लोरोकार्बन (CFCs) के जैसे ऑजोन नाशक गैसों की उपस्थिति का पता लगाया था। इन गैसों के उपयोग से संयंत्र और उड़ानों से ये विषाणु पूरी दुनिया में फैल गए थे। मोलिना ने अपने शोध के लिए 1995 में नोबेल विजेता भी बना। वे अमेरिकी राष्ट्रपति बिल क्लिंटन के वैज्ञानिक परामर्शदाता भी थे। उन्होंने विश्व स्वास्थ्य संगठन (WHO) के अध्यक्ष के रूप में भी काम किया था। मारियो मोलिना ने अपने जीवन के दौरान जलवायु परिवर्तन और वातावरणीय मुद्दों पर ध्यान केंद्रित किया। वे शिक्षण और जागरूकता को बढ़ावा देने के लिए काम करते रहे। उन्होंने अपनी जिम्मेदारियों का एहसास दिलाने के लिए उनकी भाषा में अपने विचार व्यक्त किए।

Google doodle celebrates 80th birthday. Dr. Mario Molina (1943-2020) was a Mexican-American chemist who won the Nobel Prize in Chemistry in 1995, along with Paul J. Crutzen and F. Sherwood Rowland, for their work in atmospheric chemistry, particularly for their discovery of the role of man-made chlorofluorocarbon (CFC) gases in ozone depletion. Molina was born in Mexico City and earned his undergraduate degree in chemical engineering at the National Autonomous University of Mexico before completing his Ph.D. at the University of California, Berkeley. He went on to work at the Jet Propulsion Laboratory in California before joining the faculty at the Massachusetts Institute of Technology (MIT) in 1989. Molina's research focused on the chemistry of the atmosphere and the environmental impact of human activity. His work on the effects of CFCs on the ozone layer led to the signing of the Montreal Protocol in 1987, which called for a reduction in the production and use of these chemicals

 Computers have revolutionized the way we live and work, and one of the most important developments in this field has been the creation of computer networks. In this blog post, we'll explore what computer networks are, how they work, and why they are important. What is a computer network? A computer network is a group of computers and other devices that are connected together to share resources and communicate with each other. The connections can be wired or wireless, and can range from simple local area networks (LANs) to large, global networks like the internet. Why are computer networks important? Computer networks have many benefits, including: Resource sharing: With a network, computers can share resources like printers, storage devices, and software. This can save organizations money by reducing the need for each computer to have its own resources. Communication: Networks allow users to communicate with each other in real-time, even if they are in different locations. This ca