Surge in illegal river mining revealed in global survey

Sources of Water PollutionWater pollution happens when harmful substances, like trash, chemicals, or waste, enter rivers, lakes, oceans, or groundwater and make the water unsafe. Polluted water can hurt fish, plants, animals, and people. We all need clean water to survive, so keeping it safe is important. Water pollution can come from many sources, including industrial waste from factories, pesticides and fertilizers from farms, sewage discharge, oil spills, and plastic litter. Learning about...

Surveys are essential for marking property boundaries near water bodies. Different types of surveys are defined, each with its own function. Land surveys mark the property boundaries, while route surveys determine the position of properties on nearby highways. Topographic surveys create maps by capturing the three-dimensional features of the land. Hydrographic surveys focus on the shapes of underwater areas and the movement of streams through the properties. Mine surveys determine the relative...

SeafloorThe seafloor is the bottom of the ocean and holds many secrets about Earth's history and marine life. Scientists explore the seafloor to study underwater mountains, trenches, and volcanoes. The seafloor is a hidden world, and by understanding it, we can learn about earthquakes, ocean currents, and how marine life thrives in the deep ocean. While much of the ocean remains a mystery, new technologies are allowing scientists to map and explore this unknown world.Science and Engineering...

Geographic Information System (GIS) technology is essential for risk identification, action prioritization, and resource optimization in critical situations like flooding and earthquakes. By integrating spatial and demographic data, GIS provides a comprehensive framework for emergency response.GIS integrates data layers, like rainfall intensity, topography, elevation profiles, and river levels, to model high-risk flood zones. These layers assess areas susceptible to flooding based on their...

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...

Subject: Physical ScienceChapter: Resources, Energy, and SocietyNGSS Alignment: MS-PS1-3Lesson Title: Environmental Impact of Resource UseThe extraction, processing, and use of natural resources affect the environment in many ways. Resources such as water, fossil fuels, minerals, and forests are essential for human activities, but their overuse can lead to pollution, habitat destruction, and climate change. Scientists and engineers work to develop sustainable solutions that balance resource use...