Global warming is caused by human activities that release greenhouse gases into the atmosphere, trapping heat that would otherwise escape into space. As the earth warms, ice starts to melt causing sea levels to rise and weather patterns to change. To address global warming, individuals can walk and use alternative energy sources more and conserve energy overall. Pollution comes from various sources like factories, cars, boats, and garbage and harms the environment, animals, and human health. Reducing pollution involves practices like not dumping toxins, biking more, and reducing waste through recycling and reuse.