Urbanization refers to those areas of urban that can grow by increasing human population or migration of people from rural to urban areas & then it impacts our environment like deforestation, habitat loss and decreased of biodiversity.
Air pollution due to the high concentration of traffic and industries. Increased a greenhouse gas due to which it emissions a high levels of energy consumption and transportation. Urbanization affects our environment by improper or insufficient waste or smelly problem in urban areas.
Light pollution can be a ecological issues with different consequences. loss of green space and increase of heat island is also effected. It also affect our health due to increased risk of disease by overcrowding .
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No, indeed! As you know, plants put out oxygen. When our Earth was a couple of billion years old, water filled the low spots and became the oceans. (Hugely different in location<span> and shape than now). </span>
<span>In those oceans life was created. One of the earliest life-forms was a blue-green algae. Blue-green algae is very much like a plant, and it even put out oxygen. So it was billions or trillions of these tiny algae that produced the first oxygen in Earth's atmosphere. </span>
<span>The ocean today still produces most of the oxygen on Earth.</span>