The main goal of science is to further our understanding of the processes taking place around us and to study their impacts on us and the environment (and on each other). Making beneficial uses of this knowledge is part of technology (many people may also term it as applied science). For example, millions of people die every year from various diseases. The mail goal of medical sciences is to study the origin of these diseases, how they spread and what can be the effective remedy against them. Scientists at pharmaceutical companies, then determine the best ways to counter these diseases (by direct injections or pills, etc.). Similarly, environmental scientists study the environment around us and how various processes are interlinked. They also study which processes, especially anthropogenic, are causing harm to our environment. This knowledge is then used to counteract the negative effects by improvements and legislation, say by more efficient devices and effluent discharge norms, respectively.
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