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.
Air pollution occurs when harmful substances including particulates and biological molecules are introduced into Earth's atmosphere. It may cause diseases, allergies or death in humans; it may also cause harm to other living organisms such as animals and food crops, and may damage the natural or built environment. Human activity and natural processes can both generate air pollution.