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Key aim of this paper is to find out regarding various machine learning algorithms which are utilized to identify credit card fraud. Additionally, we researched various algorithm and their implementation. Different algorithms provide specific precision depending on various conditions. We also studied about a general model which explains about the steps to be followed in order to apply the algorisms and find out the performance and accuracy.

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The ozone layer is deteriorating due to pollution in India and other parts of the world, which also greatly increases air pollution. The project's objective is to create a carbon monoxide detection system that can measure values in any application as well as track and monitor CO levels. The Internet of Things (IoT) connects things (physical objects like lights, phones, and cars) to the Internet by acting as a bridge connector to the current Internet infrastructure.Currently, only after receiving a fitness certificate (FC) from the RTO office can the vehicle's emissions be verified utilizing pollution control stations positioned across various cities. Health certificates for private vehicles are valid for 15 years, after which they must be renewed every 5 years. The fitness certificate is provided for two years and then renewed annually when it comes to vehicles. Until FC is fitted, this method prohibits us from identifying emissions brought on by car maintenance.Blynk is a cloud-based IoT analytics platform that allows you to gather, view, and analyze live data streams. This article focuses on using an MQ7 Gas sensor to prevent accidents caused by vehicle-generated carbon monoxide.