ALWAYS READY, CONNECTED, AND FAST For Alexa device owners, the free Amazon Alexa App is a companion to your Alexa device for setup, remote control, and enhanced features. Alexa is always ready to play your favorite music, provide weather and news updates, answer questions, create lists, and much more.
Health Effects of the Pollution We Cause. Exposure to emissions of lead, mercury, sulfur dioxide, particulate matter, carbon dioxide, and ozone-forming nitrogen dioxides are hazardous to public health. Toxic compounds, like mercury and lead, poison organ systems and can lead to brain damage and death.
Human-made air pollution comes from many things. Most air pollution made by humans today is because of transportation. Cars, for instance, make about 60% of the human-made air pollution. The gases inside car exhaust, like nitrogen oxide, make smog and acid rain.